<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:6463c3fb-3a6a-4e77-b90e-75d072c35681,g:4ee7d5c3-2bc3-474f-bbe0-b11d3ee9699c-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.affirm.com/role/CoverPage" xlink:type="simple" xlink:href="afrm-20220630.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CoverPage" xlink:type="extended" id="if59fdfd4715f40608338635b32981ac9_CoverPage">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_125ca096-d16b-436a-b7e8-e7f233b72196" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentType_125ca096-d16b-436a-b7e8-e7f233b72196" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_3e44f27c-8e74-4c1b-9379-686e22bd6c80" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentAnnualReport_3e44f27c-8e74-4c1b-9379-686e22bd6c80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_b498cb6b-9331-4cd0-b2d8-09360165fc5c" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentPeriodEndDate_b498cb6b-9331-4cd0-b2d8-09360165fc5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_980ba2cc-75e2-4513-8dfa-c84f504f05f4" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_CurrentFiscalYearEndDate_980ba2cc-75e2-4513-8dfa-c84f504f05f4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_0890b391-2ce8-46c0-b871-02f8eb477a37" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentTransitionReport_0890b391-2ce8-46c0-b871-02f8eb477a37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_1e649c51-a11d-4ab5-a0e5-916159f0a306" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityFileNumber_1e649c51-a11d-4ab5-a0e5-916159f0a306" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_648cee68-3eb2-4cc6-843a-f66833ebde55" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityRegistrantName_648cee68-3eb2-4cc6-843a-f66833ebde55" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_bafdaba7-8bce-4e4a-af5b-7720b4c5a8a8" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityIncorporationStateCountryCode_bafdaba7-8bce-4e4a-af5b-7720b4c5a8a8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_a98212b0-1ed4-4477-b239-d1782b07222d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityTaxIdentificationNumber_a98212b0-1ed4-4477-b239-d1782b07222d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_796554b3-5592-48d9-8010-374f27c6b2d5" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityAddressAddressLine1_796554b3-5592-48d9-8010-374f27c6b2d5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_4fc8cca8-9a41-4d8a-bda3-508bce8c1320" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityAddressCityOrTown_4fc8cca8-9a41-4d8a-bda3-508bce8c1320" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_bfec2d4a-093e-42dc-82e1-48586a30019c" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityAddressStateOrProvince_bfec2d4a-093e-42dc-82e1-48586a30019c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_de294343-e5cb-4c6c-86fc-97eaff4aa4b4" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityAddressPostalZipCode_de294343-e5cb-4c6c-86fc-97eaff4aa4b4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_82889c23-f023-41fd-b7b9-27dc55273bb3" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_CityAreaCode_82889c23-f023-41fd-b7b9-27dc55273bb3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_c0003f8d-924d-46f8-a894-30bc9c53602d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_LocalPhoneNumber_c0003f8d-924d-46f8-a894-30bc9c53602d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_23a600f4-c347-48ca-90e6-dc20713d80fb" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_Security12bTitle_23a600f4-c347-48ca-90e6-dc20713d80fb" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_8d07f687-91f2-4631-97b2-1be4f32b70d3" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_TradingSymbol_8d07f687-91f2-4631-97b2-1be4f32b70d3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_8e25d5d2-86aa-48ec-8910-545b1807dae6" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_SecurityExchangeName_8e25d5d2-86aa-48ec-8910-545b1807dae6" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_d27aa673-8038-4bbe-b901-6a054c03df8a" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_d27aa673-8038-4bbe-b901-6a054c03df8a" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_77084731-a2cc-4cfd-83b7-c5ce90d31a7d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityVoluntaryFilers_77084731-a2cc-4cfd-83b7-c5ce90d31a7d" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_4411da10-da69-46db-bdab-a25883cb6a48" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityCurrentReportingStatus_4411da10-da69-46db-bdab-a25883cb6a48" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_c5ad6c65-6e70-4e88-b4f8-a45dda167c55" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityInteractiveDataCurrent_c5ad6c65-6e70-4e88-b4f8-a45dda167c55" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_ec523b5c-d583-4726-9223-8b0e0c19a833" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityFilerCategory_ec523b5c-d583-4726-9223-8b0e0c19a833" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_2167301d-b865-4078-b9a3-290e303a03fa" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntitySmallBusiness_2167301d-b865-4078-b9a3-290e303a03fa" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_5e748f57-dba4-496c-aa84-db3f0177c63a" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityEmergingGrowthCompany_5e748f57-dba4-496c-aa84-db3f0177c63a" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_82847cd1-1017-49c4-ab3e-16663f65b378" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_IcfrAuditorAttestationFlag_82847cd1-1017-49c4-ab3e-16663f65b378" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_01a27697-54b4-4a2b-ad6d-61e0af231b24" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityShellCompany_01a27697-54b4-4a2b-ad6d-61e0af231b24" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityPublicFloat_daea11c5-9a34-4219-aa95-48205e65ab6e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityPublicFloat"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityPublicFloat_daea11c5-9a34-4219-aa95-48205e65ab6e" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_a09002da-e021-43b8-8fd5-d00ced81c91a" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_a09002da-e021-43b8-8fd5-d00ced81c91a" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentsIncorporatedByReferenceTextBlock_eaaf7ae6-5733-4af2-ba6d-c1e2767170c5" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentsIncorporatedByReferenceTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentsIncorporatedByReferenceTextBlock_eaaf7ae6-5733-4af2-ba6d-c1e2767170c5" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_ef719d15-d609-4442-aa64-6207a750871b" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_AmendmentFlag_ef719d15-d609-4442-aa64-6207a750871b" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_8d220117-830d-49c5-b5b7-c8324bed2691" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentFiscalPeriodFocus_8d220117-830d-49c5-b5b7-c8324bed2691" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_9970a405-8bdc-44dd-a855-d6d866d20c99" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentFiscalYearFocus_9970a405-8bdc-44dd-a855-d6d866d20c99" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_9d2a3c8c-5194-484f-96eb-d35d155f87db" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_EntityCentralIndexKey_9d2a3c8c-5194-484f-96eb-d35d155f87db" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_1b78f171-f2dd-4312-a4f7-05dc5216a198" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_f43026df-336c-4d5a-aaec-e6a5a8f50d1d" xlink:to="loc_dei_DocumentInformationTable_1b78f171-f2dd-4312-a4f7-05dc5216a198" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_fb8aedc3-9c41-4626-bf23-1270152d4790" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_1b78f171-f2dd-4312-a4f7-05dc5216a198" xlink:to="loc_us-gaap_StatementClassOfStockAxis_fb8aedc3-9c41-4626-bf23-1270152d4790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_fb8aedc3-9c41-4626-bf23-1270152d4790_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_fb8aedc3-9c41-4626-bf23-1270152d4790" xlink:to="loc_us-gaap_ClassOfStockDomain_fb8aedc3-9c41-4626-bf23-1270152d4790_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_f4c58993-9770-4a95-8931-606b350287ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_fb8aedc3-9c41-4626-bf23-1270152d4790" xlink:to="loc_us-gaap_ClassOfStockDomain_f4c58993-9770-4a95-8931-606b350287ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_8932c153-609b-4eda-9314-59cf2cb4ddb7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_f4c58993-9770-4a95-8931-606b350287ba" xlink:to="loc_us-gaap_CommonClassAMember_8932c153-609b-4eda-9314-59cf2cb4ddb7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_b5bb64a1-8674-4f2a-b55f-94b2e4d01744" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_f4c58993-9770-4a95-8931-606b350287ba" xlink:to="loc_us-gaap_CommonClassBMember_b5bb64a1-8674-4f2a-b55f-94b2e4d01744" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="afrm-20220630.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended" id="i322380d4a9204cd2a9a5b4d9aff5cdd7_CONSOLIDATEDBALANCESHEETS">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_5b08eca0-2751-40f9-ad52-a707b168bfa6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5b08eca0-2751-40f9-ad52-a707b168bfa6" xlink:to="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_49522863-cb69-4fe4-ab24-67cd0f288255" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_49522863-cb69-4fe4-ab24-67cd0f288255" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_775680df-0f8b-4510-8bee-dff1a5583dfd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_RestrictedCash_775680df-0f8b-4510-8bee-dff1a5583dfd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments_1c99d2f5-1c84-43fa-ad3b-c34168ddb587" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_OtherInvestments_1c99d2f5-1c84-43fa-ad3b-c34168ddb587" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleAmount_6fe8a2a6-9338-4dbc-9a19-6c2794b669db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LoansReceivableHeldForSaleAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_LoansReceivableHeldForSaleAmount_6fe8a2a6-9338-4dbc-9a19-6c2794b669db" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_3fc7d5d1-32f6-447e-a2de-b6b0fc98eb9c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_3fc7d5d1-32f6-447e-a2de-b6b0fc98eb9c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_31199566-18b4-4a61-a0bd-421f87e87e6a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_31199566-18b4-4a61-a0bd-421f87e87e6a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_7dd8ab59-7a4c-49d9-a16f-44f489e66b40" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_7dd8ab59-7a4c-49d9-a16f-44f489e66b40" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_cb9dd4e0-d4be-462c-a08f-0d182ab4ae7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_AccountsReceivableNet_cb9dd4e0-d4be-462c-a08f-0d182ab4ae7d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f80d5888-adc9-478b-99bf-e85465857fc0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_f80d5888-adc9-478b-99bf-e85465857fc0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_450b403b-c463-47e6-b6d4-649bc7e436ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_Goodwill_450b403b-c463-47e6-b6d4-649bc7e436ea" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_58a64d21-4794-40c7-ad7b-1495ae8eefde" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_58a64d21-4794-40c7-ad7b-1495ae8eefde" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetNet_0915d89a-b171-400d-9abe-0bda07b46d82" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_afrm_CommercialAgreementAssetNet_0915d89a-b171-400d-9abe-0bda07b46d82" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_e2bc42b5-dd2b-4abe-9027-a7b2286ec92d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_OtherAssets_e2bc42b5-dd2b-4abe-9027-a7b2286ec92d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_c46248fd-0e6a-4dbf-9baf-f5e285a0e3ae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_ec9b2576-45b2-4510-89c4-7e7d7bfa187d" xlink:to="loc_us-gaap_Assets_c46248fd-0e6a-4dbf-9baf-f5e285a0e3ae" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7d587ef2-e258-4ce7-90d1-7367dc31f753" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5b08eca0-2751-40f9-ad52-a707b168bfa6" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7d587ef2-e258-4ce7-90d1-7367dc31f753" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7d587ef2-e258-4ce7-90d1-7367dc31f753" xlink:to="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_8779dd73-d4c4-4c50-bd99-10232534318c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_8779dd73-d4c4-4c50-bd99-10232534318c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ThirdPartyLoanOwnerPayable_3cc77b0e-5c58-48d8-9d8b-dcf2e900517e" xlink:href="afrm-20220630.xsd#afrm_ThirdPartyLoanOwnerPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_afrm_ThirdPartyLoanOwnerPayable_3cc77b0e-5c58-48d8-9d8b-dcf2e900517e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_edb4c933-df4c-42d6-9af7-77937ef7d545" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_edb4c933-df4c-42d6-9af7-77937ef7d545" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_a3d18e10-5c94-4848-a115-bde682731ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_a3d18e10-5c94-4848-a115-bde682731ea9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebt_f2773b65-5960-4bbc-8ec2-90cafd1da31e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_ConvertibleDebt_f2773b65-5960-4bbc-8ec2-90cafd1da31e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebt_59efefbb-2c7d-4cb5-9e7e-fe7ad7326a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_SecuredDebt_59efefbb-2c7d-4cb5-9e7e-fe7ad7326a3a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_cc5bbc42-bfc4-4b57-8c97-952ee39d54d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_LineOfCredit_cc5bbc42-bfc4-4b57-8c97-952ee39d54d3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_99cd65a4-1e4d-4c37-be74-3fb10039795e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_21d3a3c4-cf33-4ab5-a6e0-ff45870cb02e" xlink:to="loc_us-gaap_Liabilities_99cd65a4-1e4d-4c37-be74-3fb10039795e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_abfb93f7-75ee-4486-aad8-d34174c5de83" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7d587ef2-e258-4ce7-90d1-7367dc31f753" xlink:to="loc_us-gaap_CommitmentsAndContingencies_abfb93f7-75ee-4486-aad8-d34174c5de83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7d587ef2-e258-4ce7-90d1-7367dc31f753" xlink:to="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_4f4c1fe3-0e8b-49eb-b06a-b3dc6eaacc43" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:to="loc_us-gaap_CommonStockValue_4f4c1fe3-0e8b-49eb-b06a-b3dc6eaacc43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_05e23fa6-da7c-4aa4-9e82-1f62f6cc24ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:to="loc_us-gaap_AdditionalPaidInCapital_05e23fa6-da7c-4aa4-9e82-1f62f6cc24ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_0d78a8a4-c084-4abf-8879-3d76fed22482" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_0d78a8a4-c084-4abf-8879-3d76fed22482" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_2a3ac27e-a558-43e9-bfaf-2b5685302c7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_2a3ac27e-a558-43e9-bfaf-2b5685302c7f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_d66e921c-30ab-4bdb-a994-2ede72f7a493" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_9e5de83a-d58f-4159-b186-224d015741e9" xlink:to="loc_us-gaap_StockholdersEquity_d66e921c-30ab-4bdb-a994-2ede72f7a493" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_7f5ab1ee-b028-44ee-b6b2-5d3a4011c5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7d587ef2-e258-4ce7-90d1-7367dc31f753" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_7f5ab1ee-b028-44ee-b6b2-5d3a4011c5a7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_a5fcd980-cbae-461d-b386-165c2a6aba28" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_5b08eca0-2751-40f9-ad52-a707b168bfa6" xlink:to="loc_us-gaap_StatementTable_a5fcd980-cbae-461d-b386-165c2a6aba28" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_af43b956-a511-4652-b735-01bb45a8ae1e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a5fcd980-cbae-461d-b386-165c2a6aba28" xlink:to="loc_us-gaap_StatementClassOfStockAxis_af43b956-a511-4652-b735-01bb45a8ae1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_af43b956-a511-4652-b735-01bb45a8ae1e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_af43b956-a511-4652-b735-01bb45a8ae1e" xlink:to="loc_us-gaap_ClassOfStockDomain_af43b956-a511-4652-b735-01bb45a8ae1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_86271353-4488-4a90-8e18-5463856c1cb1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_af43b956-a511-4652-b735-01bb45a8ae1e" xlink:to="loc_us-gaap_ClassOfStockDomain_86271353-4488-4a90-8e18-5463856c1cb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_897bca66-1e09-4793-a601-983e729e7b6c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_86271353-4488-4a90-8e18-5463856c1cb1" xlink:to="loc_us-gaap_CommonStockMember_897bca66-1e09-4793-a601-983e729e7b6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_4ba24383-1820-455e-bc64-da260bde6053" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommonStockMember_897bca66-1e09-4793-a601-983e729e7b6c" xlink:to="loc_us-gaap_CommonClassAMember_4ba24383-1820-455e-bc64-da260bde6053" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_4a118f44-3d92-454e-ae1c-5e6165bbe60b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommonStockMember_897bca66-1e09-4793-a601-983e729e7b6c" xlink:to="loc_us-gaap_CommonClassBMember_4a118f44-3d92-454e-ae1c-5e6165bbe60b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="afrm-20220630.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended" id="i147ff62c96f94b69b434f95a7dcc9da7_CONSOLIDATEDBALANCESHEETSParenthetical">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_aad73ab2-c48c-4c86-a02b-82df0c78c6d1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_aad73ab2-c48c-4c86-a02b-82df0c78c6d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_d3024eea-a555-4897-8b8a-4c317ad6b5fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_d3024eea-a555-4897-8b8a-4c317ad6b5fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_752d34ee-edf1-4317-9e68-d31bbe710473" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_CommonStockSharesIssued_752d34ee-edf1-4317-9e68-d31bbe710473" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_610e7131-8d42-4c31-a82f-ab47f7c7603c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_610e7131-8d42-4c31-a82f-ab47f7c7603c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_4f283f50-d946-4b64-817d-9bd6626ba131" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_RestrictedCash_4f283f50-d946-4b64-817d-9bd6626ba131" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_73bfbd23-7c3a-4717-b070-cffeec29a2b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_73bfbd23-7c3a-4717-b070-cffeec29a2b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_4db84fe5-b170-4f34-b90c-9d1ede9e5d47" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_4db84fe5-b170-4f34-b90c-9d1ede9e5d47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_81fc9ea6-95a1-4f5b-b58d-688b66f85ecf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_81fc9ea6-95a1-4f5b-b58d-688b66f85ecf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_39147443-9922-4e06-a9d7-401033739a14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_AccountsReceivableNet_39147443-9922-4e06-a9d7-401033739a14" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_817e2ee4-2401-4029-bd9f-5898bbcdc6a6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_OtherAssets_817e2ee4-2401-4029-bd9f-5898bbcdc6a6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_bb2ea08b-70b0-40b8-9b66-b1d12a870bcd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d5244ac1-b812-451b-9157-d4c1a30fd4bc" xlink:to="loc_us-gaap_Assets_bb2ea08b-70b0-40b8-9b66-b1d12a870bcd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_dd427cde-0afa-4d67-8388-483233ae377d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:to="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_dd427cde-0afa-4d67-8388-483233ae377d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_d037a7cc-8436-4cba-86c5-5808e840a7d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_d037a7cc-8436-4cba-86c5-5808e840a7d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_47f35cbd-072a-4689-8eb2-3365fe464479" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_47f35cbd-072a-4689-8eb2-3365fe464479" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebt_08ed0f47-3dbb-4c60-ac2f-228f88fb4cd9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:to="loc_us-gaap_SecuredDebt_08ed0f47-3dbb-4c60-ac2f-228f88fb4cd9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_319cd6e0-b140-42fe-8c70-e1ec32bdf75a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:to="loc_us-gaap_LineOfCredit_319cd6e0-b140-42fe-8c70-e1ec32bdf75a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_6801bbfc-83b1-4351-9e3c-496de390b91b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ccff9396-9c13-4ff5-acac-299a4ae23455" xlink:to="loc_us-gaap_Liabilities_6801bbfc-83b1-4351-9e3c-496de390b91b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_fba06072-7331-4f98-a56a-b3603cd9c8cc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_AssetsNet_fba06072-7331-4f98-a56a-b3603cd9c8cc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_8a61cd03-7c78-4813-9909-98e68e406931" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_27f85d38-5bbc-46da-b21d-70884269d47f" xlink:to="loc_us-gaap_StatementTable_8a61cd03-7c78-4813-9909-98e68e406931" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_5aab4e47-2634-4f32-bf3c-94d7d2e0dae3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_8a61cd03-7c78-4813-9909-98e68e406931" xlink:to="loc_us-gaap_StatementClassOfStockAxis_5aab4e47-2634-4f32-bf3c-94d7d2e0dae3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_5aab4e47-2634-4f32-bf3c-94d7d2e0dae3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_5aab4e47-2634-4f32-bf3c-94d7d2e0dae3" xlink:to="loc_us-gaap_ClassOfStockDomain_5aab4e47-2634-4f32-bf3c-94d7d2e0dae3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_ea1144e1-f99c-4f7d-bd9f-1ecc8fcb9b59" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_5aab4e47-2634-4f32-bf3c-94d7d2e0dae3" xlink:to="loc_us-gaap_ClassOfStockDomain_ea1144e1-f99c-4f7d-bd9f-1ecc8fcb9b59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_3bd1db70-26b0-43c9-b740-83ac715e5b7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_ea1144e1-f99c-4f7d-bd9f-1ecc8fcb9b59" xlink:to="loc_us-gaap_CommonClassAMember_3bd1db70-26b0-43c9-b740-83ac715e5b7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_93936964-aa7c-4ffa-8dea-e19872ac6436" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_ea1144e1-f99c-4f7d-bd9f-1ecc8fcb9b59" xlink:to="loc_us-gaap_CommonClassBMember_93936964-aa7c-4ffa-8dea-e19872ac6436" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_4d816d17-3ff9-4ae5-8f63-32761b677da8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_8a61cd03-7c78-4813-9909-98e68e406931" xlink:to="loc_srt_ConsolidatedEntitiesAxis_4d816d17-3ff9-4ae5-8f63-32761b677da8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_4d816d17-3ff9-4ae5-8f63-32761b677da8_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_4d816d17-3ff9-4ae5-8f63-32761b677da8" xlink:to="loc_srt_ConsolidatedEntitiesDomain_4d816d17-3ff9-4ae5-8f63-32761b677da8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_a9178db5-39f6-4468-91ed-a6fc123878ff" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_4d816d17-3ff9-4ae5-8f63-32761b677da8" xlink:to="loc_srt_ConsolidatedEntitiesDomain_a9178db5-39f6-4468-91ed-a6fc123878ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_7348a8e9-68d7-4360-ad12-7d4a61d8fc7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_a9178db5-39f6-4468-91ed-a6fc123878ff" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_7348a8e9-68d7-4360-ad12-7d4a61d8fc7f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS" xlink:type="simple" xlink:href="afrm-20220630.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS" xlink:type="extended" id="i8cde74b811304305accca0895103fde1_CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b11a651f-ab2c-4148-8d0f-0b1b5fb8ab9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b11a651f-ab2c-4148-8d0f-0b1b5fb8ab9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_4334ca10-ffcb-4195-80d6-a41fe71f9a32" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_4334ca10-ffcb-4195-80d6-a41fe71f9a32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSalesOfLoansNet_dfc0c3fe-e399-4e3d-8711-424a45fc0d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnSalesOfLoansNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:to="loc_us-gaap_GainLossOnSalesOfLoansNet_dfc0c3fe-e399-4e3d-8711-424a45fc0d9b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets_e1e0f030-060c-48fb-95a1-cabdd6590b6f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:to="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets_e1e0f030-060c-48fb-95a1-cabdd6590b6f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_82e9b439-7efd-4346-aabd-0a4a3823c213" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_c558d3c5-bb78-4db5-92c7-700a855ba629" xlink:to="loc_us-gaap_Revenues_82e9b439-7efd-4346-aabd-0a4a3823c213" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_LossOnFinancingReceivableCommitmentsToPurchase_dc49903a-379c-4d5f-a4c2-5bab8527a59d" xlink:href="afrm-20220630.xsd#afrm_LossOnFinancingReceivableCommitmentsToPurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_afrm_LossOnFinancingReceivableCommitmentsToPurchase_dc49903a-379c-4d5f-a4c2-5bab8527a59d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_f0de353e-2758-4c92-85d0-1f6926f67988" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_f0de353e-2758-4c92-85d0-1f6926f67988" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_f7bfdfe7-6638-458c-881a-595398e700ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_us-gaap_InterestExpenseDebt_f7bfdfe7-6638-458c-881a-595398e700ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ProcessingAndServicingExpense_204407e9-3400-4e5a-a10a-7b211df4bc36" xlink:href="afrm-20220630.xsd#afrm_ProcessingAndServicingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_afrm_ProcessingAndServicingExpense_204407e9-3400-4e5a-a10a-7b211df4bc36" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TechnologyAndDataAnalyticsExpense_ae312219-c6cc-43e7-a96c-3fb27fe651e7" xlink:href="afrm-20220630.xsd#afrm_TechnologyAndDataAnalyticsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_afrm_TechnologyAndDataAnalyticsExpense_ae312219-c6cc-43e7-a96c-3fb27fe651e7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_47a09ba6-373b-4d9a-bc4b-39b425398dd2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_us-gaap_SellingAndMarketingExpense_47a09ba6-373b-4d9a-bc4b-39b425398dd2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_5fc10886-f623-47c5-8058-70ceafb081b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_5fc10886-f623-47c5-8058-70ceafb081b5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_2cc3ee5b-b715-480f-a3a9-18b4ff973389" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_d86d453c-524e-4dc1-b7e3-2d7c263b0235" xlink:to="loc_us-gaap_CostsAndExpenses_2cc3ee5b-b715-480f-a3a9-18b4ff973389" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_181c5f20-af1c-4d44-8005-07596f35eaef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_OperatingIncomeLoss_181c5f20-af1c-4d44-8005-07596f35eaef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_c294b8d6-a864-429b-a13e-21f85fe2f8ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_c294b8d6-a864-429b-a13e-21f85fe2f8ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_f05f26fc-1633-4ef5-927a-b9201cc6a6f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_f05f26fc-1633-4ef5-927a-b9201cc6a6f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_23f5b24c-d699-43d1-8c78-85390b2a44d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_23f5b24c-d699-43d1-8c78-85390b2a44d4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_01e90372-4416-4b0e-ac9b-12b47c504884" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_NetIncomeLoss_01e90372-4416-4b0e-ac9b-12b47c504884" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_0e18acef-d984-42ed-9cf5-8f0596498274" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_0e18acef-d984-42ed-9cf5-8f0596498274" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_8b45b16b-de71-4dc1-b780-7d4aa88a7814" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_8b45b16b-de71-4dc1-b780-7d4aa88a7814" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_06357308-c52a-4d7a-88ec-3bcbce4de864" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_06357308-c52a-4d7a-88ec-3bcbce4de864" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_cb36accd-e48a-42e9-9f29-296ecd648ebb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_06357308-c52a-4d7a-88ec-3bcbce4de864" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_cb36accd-e48a-42e9-9f29-296ecd648ebb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4282108c-9e58-4430-92ca-4e62dc4d9348" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_06357308-c52a-4d7a-88ec-3bcbce4de864" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4282108c-9e58-4430-92ca-4e62dc4d9348" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_38010839-f60f-4647-a361-8776900d4f58" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_06357308-c52a-4d7a-88ec-3bcbce4de864" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_38010839-f60f-4647-a361-8776900d4f58" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_bb42befe-6233-4ba2-ba53-bcb4784dbdc8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_bb42befe-6233-4ba2-ba53-bcb4784dbdc8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_571937db-b87f-46d1-bf7b-599cff08a376" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_EarningsPerShareAbstract_571937db-b87f-46d1-bf7b-599cff08a376" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_a4b19eec-78d5-49ec-b13e-b39b7d405512" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_571937db-b87f-46d1-bf7b-599cff08a376" xlink:to="loc_us-gaap_EarningsPerShareBasic_a4b19eec-78d5-49ec-b13e-b39b7d405512" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_31e9748b-3db7-498d-a40f-9ef569433629" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_571937db-b87f-46d1-bf7b-599cff08a376" xlink:to="loc_us-gaap_EarningsPerShareDiluted_31e9748b-3db7-498d-a40f-9ef569433629" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_dbaaed26-2cff-41b8-8bbe-20bf2c70df31" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_dbaaed26-2cff-41b8-8bbe-20bf2c70df31" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_06de2d4b-e013-4cd9-b0ab-734f78ea3e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_dbaaed26-2cff-41b8-8bbe-20bf2c70df31" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_06de2d4b-e013-4cd9-b0ab-734f78ea3e0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_82b08617-0206-4356-82d6-baae00f93348" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_dbaaed26-2cff-41b8-8bbe-20bf2c70df31" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_82b08617-0206-4356-82d6-baae00f93348" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_836b8ce9-2cf6-43e2-a0aa-a56b527b04dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_eea0dba0-f112-49d2-8a6a-258e607b4c25" xlink:to="loc_us-gaap_StatementTable_836b8ce9-2cf6-43e2-a0aa-a56b527b04dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_3d01817a-b940-433a-a48f-ad4395edbb4a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_836b8ce9-2cf6-43e2-a0aa-a56b527b04dd" xlink:to="loc_srt_ProductOrServiceAxis_3d01817a-b940-433a-a48f-ad4395edbb4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3d01817a-b940-433a-a48f-ad4395edbb4a_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_3d01817a-b940-433a-a48f-ad4395edbb4a" xlink:to="loc_srt_ProductsAndServicesDomain_3d01817a-b940-433a-a48f-ad4395edbb4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e7bc5775-3c82-4dad-a695-f45fb2cbe9bd" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_3d01817a-b940-433a-a48f-ad4395edbb4a" xlink:to="loc_srt_ProductsAndServicesDomain_e7bc5775-3c82-4dad-a695-f45fb2cbe9bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MerchantNetworkMember_5fd9be93-7b73-4c80-9456-a16fd06e554b" xlink:href="afrm-20220630.xsd#afrm_MerchantNetworkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e7bc5775-3c82-4dad-a695-f45fb2cbe9bd" xlink:to="loc_afrm_MerchantNetworkMember_5fd9be93-7b73-4c80-9456-a16fd06e554b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_VirtualCardNetworkMember_8a54c4bf-f5a6-4646-b82f-b07c05ea2bd5" xlink:href="afrm-20220630.xsd#afrm_VirtualCardNetworkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e7bc5775-3c82-4dad-a695-f45fb2cbe9bd" xlink:to="loc_afrm_VirtualCardNetworkMember_8a54c4bf-f5a6-4646-b82f-b07c05ea2bd5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT" xlink:type="simple" xlink:href="afrm-20220630.xsd#CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT" xlink:type="extended" id="i8e8dda7dc1dc455197e261730584edbc_CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICIT">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_e10d7d46-52cd-4f76-87f8-0c929fd97750" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e10d7d46-52cd-4f76-87f8-0c929fd97750" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_274f5f51-950b-45ab-8431-3dc0fe8d6613" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_274f5f51-950b-45ab-8431-3dc0fe8d6613" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_80a7be4f-3545-454b-9567-b7cdb4fb688e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_80a7be4f-3545-454b-9567-b7cdb4fb688e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_a06655fd-4361-4dd8-811c-51d2e29e7547" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_a06655fd-4361-4dd8-811c-51d2e29e7547" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_65c071b3-4477-48c2-b734-2a199bc27d71" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_65c071b3-4477-48c2-b734-2a199bc27d71" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockRepurchasedDuringPeriodShares_f261dc4c-db8f-4308-a10f-08d88c4cdf8c" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockRepurchasedDuringPeriodShares_f261dc4c-db8f-4308-a10f-08d88c4cdf8c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockRepurchasedDuringPeriodValue_d14b258e-96ac-4840-ae51-347857525dca" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockRepurchasedDuringPeriodValue_d14b258e-96ac-4840-ae51-347857525dca" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_e745aefd-2c42-42c8-88d9-398515bd4569" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_e745aefd-2c42-42c8-88d9-398515bd4569" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodValueConversionOfConvertibleSecurities_c8082b16-846a-4481-8ea0-daae772b2131" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodValueConversionOfConvertibleSecurities_c8082b16-846a-4481-8ea0-daae772b2131" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionsOfRedeemableConvertiblePreferredStock_dd428ab0-b61d-4452-a681-b960b040e714" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionsOfRedeemableConvertiblePreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionsOfRedeemableConvertiblePreferredStock_dd428ab0-b61d-4452-a681-b960b040e714" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodValueConversionsOfRedeemableConvertiblePreferredStock_bf4569d2-3128-4446-999c-4ac69805b394" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodValueConversionsOfRedeemableConvertiblePreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_14c594e6-f6da-4795-9dd8-8c4a11b480ed" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodValueConversionsOfRedeemableConvertiblePreferredStock_bf4569d2-3128-4446-999c-4ac69805b394" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_61955c15-f8b4-4e06-b786-61a4b808e2ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_948ffab3-9892-4ade-af00-4289f7f10bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e10d7d46-52cd-4f76-87f8-0c929fd97750" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_8543c975-7544-4640-8edc-1429435fd4f6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_8543c975-7544-4640-8edc-1429435fd4f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_9155ac42-97f2-4285-bdf5-7eced453ee9b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockholdersEquity_9155ac42-97f2-4285-bdf5-7eced453ee9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentIssuedAtSubstantialPremium_33a31a7e-0bfb-4893-aa36-b0fc822f1339" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentIssuedAtSubstantialPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentIssuedAtSubstantialPremium_33a31a7e-0bfb-4893-aa36-b0fc822f1339" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_7d9e964b-4748-44f5-a25d-a0421f5119fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_7d9e964b-4748-44f5-a25d-a0421f5119fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_6b0dc4c3-5760-4726-9ddf-bfb4c22e3d3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_6b0dc4c3-5760-4726-9ddf-bfb4c22e3d3b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_a997763b-ed27-4137-9d92-92b06c81fb18" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_a997763b-ed27-4137-9d92-92b06c81fb18" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_c492d310-22cc-4a16-8e7b-b4122cbed7af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_c492d310-22cc-4a16-8e7b-b4122cbed7af" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_ee986773-2179-4481-aab5-210e959100c8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_ee986773-2179-4481-aab5-210e959100c8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_e4d813b9-d5f2-4d10-b3df-eaf8d138cead" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_e4d813b9-d5f2-4d10-b3df-eaf8d138cead" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_StockIssuedDuringPeriodSharesWarrantsExercised_3e9e06ed-1595-4f53-91aa-13641aae2c9c" xlink:href="afrm-20220630.xsd#afrm_StockIssuedDuringPeriodSharesWarrantsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_afrm_StockIssuedDuringPeriodSharesWarrantsExercised_3e9e06ed-1595-4f53-91aa-13641aae2c9c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_StockIssuedDuringPeriodValueWarrantsExercised_7a53ce7e-195a-48c2-8b30-10c685a0511f" xlink:href="afrm-20220630.xsd#afrm_StockIssuedDuringPeriodValueWarrantsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_afrm_StockIssuedDuringPeriodValueWarrantsExercised_7a53ce7e-195a-48c2-8b30-10c685a0511f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_e73c8c88-27f6-4fa1-bcf2-0a8745eb1fcd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_e73c8c88-27f6-4fa1-bcf2-0a8745eb1fcd" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_5f7c6bcf-e3aa-4e97-bb44-77d2c55a39d8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_5f7c6bcf-e3aa-4e97-bb44-77d2c55a39d8" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_4639c9e8-f631-4b0b-bd1c-52e48ac93998" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_4639c9e8-f631-4b0b-bd1c-52e48ac93998" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_14956a62-4ec3-4adb-8269-a4cc2581b4ae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_14956a62-4ec3-4adb-8269-a4cc2581b4ae" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_ef500dd1-87f7-4b0e-bfa6-8dbf92c74ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_ef500dd1-87f7-4b0e-bfa6-8dbf92c74ec2" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_StockIssuedFromExerciseOfWarrantsValue_b87f7989-65b1-426f-be4b-3a2feb8e4103" xlink:href="afrm-20220630.xsd#afrm_StockIssuedFromExerciseOfWarrantsValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_afrm_StockIssuedFromExerciseOfWarrantsValue_b87f7989-65b1-426f-be4b-3a2feb8e4103" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_3721a426-7c7b-4e09-bbd1-b0f43e1b1221" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_3721a426-7c7b-4e09-bbd1-b0f43e1b1221" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_9f198674-95ee-430c-a1c4-84922444de97" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_9f198674-95ee-430c-a1c4-84922444de97" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AdjustmentsToAdditionalPaidInCapitalTemporaryEquityDecreaseInCarryingAmountOfRedeemablePreferredStock_1ad6b975-89a9-459f-8e78-4de634e81b5c" xlink:href="afrm-20220630.xsd#afrm_AdjustmentsToAdditionalPaidInCapitalTemporaryEquityDecreaseInCarryingAmountOfRedeemablePreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_afrm_AdjustmentsToAdditionalPaidInCapitalTemporaryEquityDecreaseInCarryingAmountOfRedeemablePreferredStock_1ad6b975-89a9-459f-8e78-4de634e81b5c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature_46d26e97-25cc-4430-aeec-e3d3d05e0cf2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature_46d26e97-25cc-4430-aeec-e3d3d05e0cf2" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_dadc4007-a363-488a-86fe-b2d1faff6cb6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_dadc4007-a363-488a-86fe-b2d1faff6cb6" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_f41f66da-1161-4b52-85c2-84e940457ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_f41f66da-1161-4b52-85c2-84e940457ed3" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_StockholdersEquityDeconsolidationOfVariableInterestEntity_b2967c4a-055b-4be1-84d7-fcc8e61d4546" xlink:href="afrm-20220630.xsd#afrm_StockholdersEquityDeconsolidationOfVariableInterestEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_afrm_StockholdersEquityDeconsolidationOfVariableInterestEntity_b2967c4a-055b-4be1-84d7-fcc8e61d4546" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_8eece7d8-af7f-454e-98ca-9f0f66fb498f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_8eece7d8-af7f-454e-98ca-9f0f66fb498f" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_bdc92879-7560-4027-bdc6-d514ae6f9542" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_bdc92879-7560-4027-bdc6-d514ae6f9542" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_0e004abb-775c-4323-883c-4882a64a5c36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_4e041837-dd9a-4c9a-8af2-4e2d763ea717" xlink:to="loc_us-gaap_NetIncomeLoss_0e004abb-775c-4323-883c-4882a64a5c36" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_d10fcae2-299f-40a0-9816-086a48c2ce42" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_b0c4efc1-2f31-46ea-97bb-71e3185bb200" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_05d1ab84-34f9-4d72-a39b-085c01930f51" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_e10d7d46-52cd-4f76-87f8-0c929fd97750" xlink:to="loc_us-gaap_StatementTable_05d1ab84-34f9-4d72-a39b-085c01930f51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_4ba1ad12-9fca-43c3-88c4-1bc599630766" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_05d1ab84-34f9-4d72-a39b-085c01930f51" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_4ba1ad12-9fca-43c3-88c4-1bc599630766" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_4ba1ad12-9fca-43c3-88c4-1bc599630766_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4ba1ad12-9fca-43c3-88c4-1bc599630766" xlink:to="loc_us-gaap_EquityComponentDomain_4ba1ad12-9fca-43c3-88c4-1bc599630766_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_54b91a68-f857-4525-8495-a7017de5d3d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4ba1ad12-9fca-43c3-88c4-1bc599630766" xlink:to="loc_us-gaap_EquityComponentDomain_54b91a68-f857-4525-8495-a7017de5d3d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_69434f13-1d3d-46ad-9201-c62834b50881" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_54b91a68-f857-4525-8495-a7017de5d3d5" xlink:to="loc_us-gaap_CommonStockMember_69434f13-1d3d-46ad-9201-c62834b50881" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_8268ce2b-098a-4ccb-a9a1-292d13427f9c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_54b91a68-f857-4525-8495-a7017de5d3d5" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_8268ce2b-098a-4ccb-a9a1-292d13427f9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_f8846258-f891-4d69-9112-b9e435c953a9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_54b91a68-f857-4525-8495-a7017de5d3d5" xlink:to="loc_us-gaap_RetainedEarningsMember_f8846258-f891-4d69-9112-b9e435c953a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ab558d07-ae29-46be-a81e-66d0fdc587fb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_54b91a68-f857-4525-8495-a7017de5d3d5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ab558d07-ae29-46be-a81e-66d0fdc587fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_29173e89-b95e-4134-8947-dea5df04b2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_05d1ab84-34f9-4d72-a39b-085c01930f51" xlink:to="loc_us-gaap_StatementClassOfStockAxis_29173e89-b95e-4134-8947-dea5df04b2c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_29173e89-b95e-4134-8947-dea5df04b2c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_29173e89-b95e-4134-8947-dea5df04b2c5" xlink:to="loc_us-gaap_ClassOfStockDomain_29173e89-b95e-4134-8947-dea5df04b2c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9bb8d065-1b0d-4356-bc58-0cf109eabd95" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_29173e89-b95e-4134-8947-dea5df04b2c5" xlink:to="loc_us-gaap_ClassOfStockDomain_9bb8d065-1b0d-4356-bc58-0cf109eabd95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_012987ed-7420-488c-90ad-7c214d2a76e0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9bb8d065-1b0d-4356-bc58-0cf109eabd95" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_012987ed-7420-488c-90ad-7c214d2a76e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_4b6af701-dec0-4873-8c76-fd17e6e4a856" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9bb8d065-1b0d-4356-bc58-0cf109eabd95" xlink:to="loc_us-gaap_CommonStockMember_4b6af701-dec0-4873-8c76-fd17e6e4a856" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_242cad25-0707-4a14-8b8b-f62687fb8654" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_05d1ab84-34f9-4d72-a39b-085c01930f51" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_242cad25-0707-4a14-8b8b-f62687fb8654" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_242cad25-0707-4a14-8b8b-f62687fb8654_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_242cad25-0707-4a14-8b8b-f62687fb8654" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_242cad25-0707-4a14-8b8b-f62687fb8654_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_ae341787-9373-4a05-ac3c-c55122e33149" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_242cad25-0707-4a14-8b8b-f62687fb8654" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_ae341787-9373-4a05-ac3c-c55122e33149" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_8a67e550-fbb1-442c-8508-6f992d38f938" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_ae341787-9373-4a05-ac3c-c55122e33149" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_8a67e550-fbb1-442c-8508-6f992d38f938" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICITParenthetical" xlink:type="simple" xlink:href="afrm-20220630.xsd#CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICITParenthetical"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICITParenthetical" xlink:type="extended" id="i2a6beb879c6e42198eb70317665d910c_CONSOLIDATEDSTATEMENTOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITYDEFICITParenthetical">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_ff0af239-ccf1-4ae0-9294-c6d76b5d054b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_38456936-b49e-4f5c-b7de-885c9a1aa935" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_ff0af239-ccf1-4ae0-9294-c6d76b5d054b" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_38456936-b49e-4f5c-b7de-885c9a1aa935" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_3faacd93-549d-4ec2-9092-95826369481f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_ff0af239-ccf1-4ae0-9294-c6d76b5d054b" xlink:to="loc_us-gaap_StatementTable_3faacd93-549d-4ec2-9092-95826369481f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_24422b83-954b-46fe-ad64-7ce947dc1c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3faacd93-549d-4ec2-9092-95826369481f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_24422b83-954b-46fe-ad64-7ce947dc1c5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_24422b83-954b-46fe-ad64-7ce947dc1c5c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_24422b83-954b-46fe-ad64-7ce947dc1c5c" xlink:to="loc_us-gaap_ClassOfStockDomain_24422b83-954b-46fe-ad64-7ce947dc1c5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_6196fc3e-4eb9-495b-a853-e286f16ceacd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_24422b83-954b-46fe-ad64-7ce947dc1c5c" xlink:to="loc_us-gaap_ClassOfStockDomain_6196fc3e-4eb9-495b-a853-e286f16ceacd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_c33e1fc9-13c8-42e3-89ad-d69322b81628" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6196fc3e-4eb9-495b-a853-e286f16ceacd" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_c33e1fc9-13c8-42e3-89ad-d69322b81628" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/BusinessDescriptionDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#BusinessDescriptionDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/BusinessDescriptionDetails" xlink:type="extended" id="i2276a245a97a4fd79a2398847c9e1c52_BusinessDescriptionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_09a13d27-5317-43ca-897f-e3b2419178d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableLoanTerm_ac61bbde-c2ce-498b-bd06-cc5865527628" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableLoanTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_09a13d27-5317-43ca-897f-e3b2419178d4" xlink:to="loc_afrm_FinancingReceivableLoanTerm_ac61bbde-c2ce-498b-bd06-cc5865527628" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_fd624956-39a9-4f93-aea6-f0990b4ed8b3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_09a13d27-5317-43ca-897f-e3b2419178d4" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_fd624956-39a9-4f93-aea6-f0990b4ed8b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d4a21896-2d96-4879-b2ad-04cf42845ae8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_fd624956-39a9-4f93-aea6-f0990b4ed8b3" xlink:to="loc_srt_RangeAxis_d4a21896-2d96-4879-b2ad-04cf42845ae8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d4a21896-2d96-4879-b2ad-04cf42845ae8_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d4a21896-2d96-4879-b2ad-04cf42845ae8" xlink:to="loc_srt_RangeMember_d4a21896-2d96-4879-b2ad-04cf42845ae8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_bc33895b-e430-414a-9d50-7f66560f0668" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d4a21896-2d96-4879-b2ad-04cf42845ae8" xlink:to="loc_srt_RangeMember_bc33895b-e430-414a-9d50-7f66560f0668" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_bd400f34-2c20-4f86-bb9c-af147a981c4e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bc33895b-e430-414a-9d50-7f66560f0668" xlink:to="loc_srt_MinimumMember_bd400f34-2c20-4f86-bb9c-af147a981c4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_cf2349c7-9fdf-4e94-9367-02cd2e74acbc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bc33895b-e430-414a-9d50-7f66560f0668" xlink:to="loc_srt_MaximumMember_cf2349c7-9fdf-4e94-9367-02cd2e74acbc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SummaryofSignificantAccountingPoliciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="extended" id="if87f8f1effbf4185923faea3d03a245a_SummaryofSignificantAccountingPoliciesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_4bc4746b-ae17-4403-916e-fbe02b60d8be" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_4bc4746b-ae17-4403-916e-fbe02b60d8be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_b187291a-441a-43e3-8e48-938d9e9d0f7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_NumberOfReportableSegments_b187291a-441a-43e3-8e48-938d9e9d0f7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_a1dca7f3-9049-461d-bf09-2edbcf370fe4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_NumberOfOperatingSegments_a1dca7f3-9049-461d-bf09-2edbcf370fe4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableHeldForSaleSalePeriod_19da5fab-9a8a-4e51-a673-b972969a9bf1" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableHeldForSaleSalePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_afrm_FinancingReceivableHeldForSaleSalePeriod_19da5fab-9a8a-4e51-a673-b972969a9bf1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff_a663639b-a844-498f-9490-e6000364138d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff_a663639b-a844-498f-9490-e6000364138d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_8b603e12-f1d2-4364-acbe-5584feb25d3d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_8b603e12-f1d2-4364-acbe-5584feb25d3d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_075bede1-150f-49ef-9ac8-da532e4fa447" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_075bede1-150f-49ef-9ac8-da532e4fa447" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8cfef754-9600-4add-b562-4aab27ffef03" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8cfef754-9600-4add-b562-4aab27ffef03" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_5a96e216-80e6-4e0d-bf66-ca986405db57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_5a96e216-80e6-4e0d-bf66-ca986405db57" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_d7b3c830-0c62-4087-9f11-31c780cea15d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_AdvertisingExpense_d7b3c830-0c62-4087-9f11-31c780cea15d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_4237ce57-2c01-45b6-9f51-290e3e005020" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_4237ce57-2c01-45b6-9f51-290e3e005020" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingLiabilityAtFairValueChangeInFairValueValuationInputStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_befb499e-82b7-4e2f-9e07-1c567cfa94e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingLiabilityAtFairValueChangeInFairValueValuationInputStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_ServicingLiabilityAtFairValueChangeInFairValueValuationInputStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_befb499e-82b7-4e2f-9e07-1c567cfa94e7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_a20b09b5-ee25-418b-a54a-2f1842bc47a3" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_b812f33c-e8a4-4585-8e2b-649976d07627" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:to="loc_srt_RestatementAxis_b812f33c-e8a4-4585-8e2b-649976d07627" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_b812f33c-e8a4-4585-8e2b-649976d07627_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_b812f33c-e8a4-4585-8e2b-649976d07627" xlink:to="loc_srt_RestatementDomain_b812f33c-e8a4-4585-8e2b-649976d07627_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_b373e5ec-7adb-43c3-bb34-81f3bf541672" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_b812f33c-e8a4-4585-8e2b-649976d07627" xlink:to="loc_srt_RestatementDomain_b373e5ec-7adb-43c3-bb34-81f3bf541672" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_e74487f7-4505-4b57-85bf-052b0def2750" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_b373e5ec-7adb-43c3-bb34-81f3bf541672" xlink:to="loc_srt_RestatementAdjustmentMember_e74487f7-4505-4b57-85bf-052b0def2750" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_50fbcbbf-12fa-474c-83a7-e47f9c5c775c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:to="loc_us-gaap_AwardTypeAxis_50fbcbbf-12fa-474c-83a7-e47f9c5c775c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_50fbcbbf-12fa-474c-83a7-e47f9c5c775c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_50fbcbbf-12fa-474c-83a7-e47f9c5c775c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_50fbcbbf-12fa-474c-83a7-e47f9c5c775c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3bcd79ff-9496-4972-8ea1-53eed01e2802" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_50fbcbbf-12fa-474c-83a7-e47f9c5c775c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3bcd79ff-9496-4972-8ea1-53eed01e2802" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_5c6db56f-5cf6-46c8-ac5f-3dbf920b95ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3bcd79ff-9496-4972-8ea1-53eed01e2802" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_5c6db56f-5cf6-46c8-ac5f-3dbf920b95ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f7263305-ddf3-434a-a0b4-38248470d503" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:to="loc_srt_RangeAxis_f7263305-ddf3-434a-a0b4-38248470d503" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f7263305-ddf3-434a-a0b4-38248470d503_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_f7263305-ddf3-434a-a0b4-38248470d503" xlink:to="loc_srt_RangeMember_f7263305-ddf3-434a-a0b4-38248470d503_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4cb6c4f8-922a-49fd-bf29-2817b19670e0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_f7263305-ddf3-434a-a0b4-38248470d503" xlink:to="loc_srt_RangeMember_4cb6c4f8-922a-49fd-bf29-2817b19670e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_dcbfb605-89ce-4df4-997b-dfd3859f86fe" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4cb6c4f8-922a-49fd-bf29-2817b19670e0" xlink:to="loc_srt_MinimumMember_dcbfb605-89ce-4df4-997b-dfd3859f86fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_12453fca-1922-4ad2-8cdd-7f1060351c9d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4cb6c4f8-922a-49fd-bf29-2817b19670e0" xlink:to="loc_srt_MaximumMember_12453fca-1922-4ad2-8cdd-7f1060351c9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_55e586d4-4f31-42d9-8604-df56f821de9a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_55e586d4-4f31-42d9-8604-df56f821de9a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_55e586d4-4f31-42d9-8604-df56f821de9a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_55e586d4-4f31-42d9-8604-df56f821de9a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_55e586d4-4f31-42d9-8604-df56f821de9a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_be1449a9-661c-4c1b-8500-a9ed62447f60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_55e586d4-4f31-42d9-8604-df56f821de9a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_be1449a9-661c-4c1b-8500-a9ed62447f60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentMember_08a5ee7c-379f-45f6-a9f8-fe1843fd10f2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_be1449a9-661c-4c1b-8500-a9ed62447f60" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentMember_08a5ee7c-379f-45f6-a9f8-fe1843fd10f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_6a188398-d29a-4757-be12-8d9a4521ff3c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_be1449a9-661c-4c1b-8500-a9ed62447f60" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_6a188398-d29a-4757-be12-8d9a4521ff3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_9f1fc255-0365-4233-bf1c-a8dca719fad9" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_9183ed52-4bd5-4442-b3a1-48550ac38ae1" xlink:to="loc_srt_ProductOrServiceAxis_9f1fc255-0365-4233-bf1c-a8dca719fad9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9f1fc255-0365-4233-bf1c-a8dca719fad9_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_9f1fc255-0365-4233-bf1c-a8dca719fad9" xlink:to="loc_srt_ProductsAndServicesDomain_9f1fc255-0365-4233-bf1c-a8dca719fad9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b40155ff-a468-4910-9991-699c1e884004" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_9f1fc255-0365-4233-bf1c-a8dca719fad9" xlink:to="loc_srt_ProductsAndServicesDomain_b40155ff-a468-4910-9991-699c1e884004" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MerchantNetworkMember_7d2f927b-d7fa-4d9c-b583-667e3ede06fb" xlink:href="afrm-20220630.xsd#afrm_MerchantNetworkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b40155ff-a468-4910-9991-699c1e884004" xlink:to="loc_afrm_MerchantNetworkMember_7d2f927b-d7fa-4d9c-b583-667e3ede06fb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedBalanceSheetsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SummaryofSignificantAccountingPoliciesConsolidatedBalanceSheetsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedBalanceSheetsDetails" xlink:type="extended" id="i0e5fdf68b517484899ae4eb6d54adee2_SummaryofSignificantAccountingPoliciesConsolidatedBalanceSheetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_af07e904-b50a-4f46-9e9b-d226b2bc53ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_ecd74811-64e7-413d-a597-9b2a12907882" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_af07e904-b50a-4f46-9e9b-d226b2bc53ac" xlink:to="loc_us-gaap_LiabilitiesAbstract_ecd74811-64e7-413d-a597-9b2a12907882" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_d2320fb7-9a5b-4b81-9787-45a37ac7ad80" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ecd74811-64e7-413d-a597-9b2a12907882" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_d2320fb7-9a5b-4b81-9787-45a37ac7ad80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_e424da3c-d53f-4b4a-b1c1-da880ab4536c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_ecd74811-64e7-413d-a597-9b2a12907882" xlink:to="loc_us-gaap_Liabilities_e424da3c-d53f-4b4a-b1c1-da880ab4536c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_fa1a9f1e-3c9e-40e9-9256-e53e72ae82ce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_af07e904-b50a-4f46-9e9b-d226b2bc53ac" xlink:to="loc_us-gaap_StockholdersEquityAbstract_fa1a9f1e-3c9e-40e9-9256-e53e72ae82ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_5fab5555-93a6-43eb-9e61-a388b439b15a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_fa1a9f1e-3c9e-40e9-9256-e53e72ae82ce" xlink:to="loc_us-gaap_AdditionalPaidInCapital_5fab5555-93a6-43eb-9e61-a388b439b15a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_cdebd4be-4713-431f-ac73-8f4d60984345" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_fa1a9f1e-3c9e-40e9-9256-e53e72ae82ce" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_cdebd4be-4713-431f-ac73-8f4d60984345" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_01ff3e18-c4f9-49e2-a692-03bb86f2b388" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_fa1a9f1e-3c9e-40e9-9256-e53e72ae82ce" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_01ff3e18-c4f9-49e2-a692-03bb86f2b388" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_a38a0e2f-c92c-496b-91fe-fa1d7d535094" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_fa1a9f1e-3c9e-40e9-9256-e53e72ae82ce" xlink:to="loc_us-gaap_StockholdersEquity_a38a0e2f-c92c-496b-91fe-fa1d7d535094" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_7925632b-5ec5-4ae6-8cbf-c62f17b7abe1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_af07e904-b50a-4f46-9e9b-d226b2bc53ac" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_7925632b-5ec5-4ae6-8cbf-c62f17b7abe1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_78217ad5-234a-4aca-aa81-1f27780860bd" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_7925632b-5ec5-4ae6-8cbf-c62f17b7abe1" xlink:to="loc_srt_RestatementAxis_78217ad5-234a-4aca-aa81-1f27780860bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_78217ad5-234a-4aca-aa81-1f27780860bd_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_78217ad5-234a-4aca-aa81-1f27780860bd" xlink:to="loc_srt_RestatementDomain_78217ad5-234a-4aca-aa81-1f27780860bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_e30b55ec-3cfe-4ab9-b052-b433fcd7404a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_78217ad5-234a-4aca-aa81-1f27780860bd" xlink:to="loc_srt_RestatementDomain_e30b55ec-3cfe-4ab9-b052-b433fcd7404a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_42371e1a-22c8-4862-9a28-83d049d94c1b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_e30b55ec-3cfe-4ab9-b052-b433fcd7404a" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_42371e1a-22c8-4862-9a28-83d049d94c1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_e5da4f94-d009-4f65-9d48-77807ab171e8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_e30b55ec-3cfe-4ab9-b052-b433fcd7404a" xlink:to="loc_srt_RestatementAdjustmentMember_e5da4f94-d009-4f65-9d48-77807ab171e8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedStatementofOperationsandComprehensiveLossDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SummaryofSignificantAccountingPoliciesConsolidatedStatementofOperationsandComprehensiveLossDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedStatementofOperationsandComprehensiveLossDetails" xlink:type="extended" id="i859a2d21fbeb4fdd9b6cd8b15b9b21a1_SummaryofSignificantAccountingPoliciesConsolidatedStatementofOperationsandComprehensiveLossDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ProcessingAndServicingExpense_18191607-da12-4784-871a-33dd26d770af" xlink:href="afrm-20220630.xsd#afrm_ProcessingAndServicingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:to="loc_afrm_ProcessingAndServicingExpense_18191607-da12-4784-871a-33dd26d770af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TechnologyAndDataAnalyticsExpense_aaddef9d-b001-4d78-997d-e1201c2766ee" xlink:href="afrm-20220630.xsd#afrm_TechnologyAndDataAnalyticsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:to="loc_afrm_TechnologyAndDataAnalyticsExpense_aaddef9d-b001-4d78-997d-e1201c2766ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_93deea05-e816-42af-b215-e8abac44769f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:to="loc_us-gaap_SellingAndMarketingExpense_93deea05-e816-42af-b215-e8abac44769f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_f04591a4-7e8a-41b4-aefb-d2cfca550197" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_f04591a4-7e8a-41b4-aefb-d2cfca550197" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_103a919b-94a2-4fa8-9138-5b90564527c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:to="loc_us-gaap_CostsAndExpenses_103a919b-94a2-4fa8-9138-5b90564527c6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_4c495ec0-cc40-4170-828e-664ebe8f2a10" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_68fff64b-9ddb-4ead-b002-43fb2fb38758" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_4c495ec0-cc40-4170-828e-664ebe8f2a10" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_85f3b58a-a3d5-4cb4-aaa5-5ee60ee94d26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_85f3b58a-a3d5-4cb4-aaa5-5ee60ee94d26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_b7e4a2c3-8dc6-4d7a-b2c1-c6b65f005f76" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_NetIncomeLoss_b7e4a2c3-8dc6-4d7a-b2c1-c6b65f005f76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_e720196a-bf07-46f5-baa2-4338b23fc4fb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_e720196a-bf07-46f5-baa2-4338b23fc4fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_fd120e77-8eb1-4ed0-99c8-819bbd01477e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_e720196a-bf07-46f5-baa2-4338b23fc4fb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_fd120e77-8eb1-4ed0-99c8-819bbd01477e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_439f5083-1abe-4b8d-b3f1-5129b6f7cf42" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_e720196a-bf07-46f5-baa2-4338b23fc4fb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_439f5083-1abe-4b8d-b3f1-5129b6f7cf42" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_0984db63-927d-47b9-89bb-775d863f7569" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_0984db63-927d-47b9-89bb-775d863f7569" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_3fba8abb-831d-479f-a127-fd13920f8ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_EarningsPerShareAbstract_3fba8abb-831d-479f-a127-fd13920f8ab0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_c80e12cc-df03-46ee-abd6-a85d13dd5342" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_3fba8abb-831d-479f-a127-fd13920f8ab0" xlink:to="loc_us-gaap_EarningsPerShareBasic_c80e12cc-df03-46ee-abd6-a85d13dd5342" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_7ac61c6b-13ed-4f2d-b457-bcdb8fca77e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_3fba8abb-831d-479f-a127-fd13920f8ab0" xlink:to="loc_us-gaap_EarningsPerShareDiluted_7ac61c6b-13ed-4f2d-b457-bcdb8fca77e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_814ebca8-3bdd-4db7-82a6-28b98a10dbb8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_3e14f7dc-1098-4966-8cc9-de29b42d7fa6" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_814ebca8-3bdd-4db7-82a6-28b98a10dbb8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_08c620d4-4af2-4995-a28c-43cc0c5dd476" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_814ebca8-3bdd-4db7-82a6-28b98a10dbb8" xlink:to="loc_srt_RestatementAxis_08c620d4-4af2-4995-a28c-43cc0c5dd476" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_08c620d4-4af2-4995-a28c-43cc0c5dd476_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_08c620d4-4af2-4995-a28c-43cc0c5dd476" xlink:to="loc_srt_RestatementDomain_08c620d4-4af2-4995-a28c-43cc0c5dd476_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_d9ea0576-6fa4-4741-b4d0-b5749daa2c54" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_08c620d4-4af2-4995-a28c-43cc0c5dd476" xlink:to="loc_srt_RestatementDomain_d9ea0576-6fa4-4741-b4d0-b5749daa2c54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_6a5503e8-5778-4dd3-9f08-021642f0c39c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_d9ea0576-6fa4-4741-b4d0-b5749daa2c54" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_6a5503e8-5778-4dd3-9f08-021642f0c39c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_a7154672-bed5-4d03-b9c9-19fcef184d2d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_d9ea0576-6fa4-4741-b4d0-b5749daa2c54" xlink:to="loc_srt_RestatementAdjustmentMember_a7154672-bed5-4d03-b9c9-19fcef184d2d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedStatementofRedeemableConvertiblePreferredStockandStockholdersEquityDeficitDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SummaryofSignificantAccountingPoliciesConsolidatedStatementofRedeemableConvertiblePreferredStockandStockholdersEquityDeficitDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedStatementofRedeemableConvertiblePreferredStockandStockholdersEquityDeficitDetails" xlink:type="extended" id="i8a0568c90360400cb37c525337844482_SummaryofSignificantAccountingPoliciesConsolidatedStatementofRedeemableConvertiblePreferredStockandStockholdersEquityDeficitDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_438f6026-646d-4125-9550-0073c9000974" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_f5037636-86fd-4b53-ac11-daa8478e1d59" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_438f6026-646d-4125-9550-0073c9000974" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_f5037636-86fd-4b53-ac11-daa8478e1d59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_09946527-6101-4814-b22c-249e9e30d997" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_f5037636-86fd-4b53-ac11-daa8478e1d59" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_09946527-6101-4814-b22c-249e9e30d997" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_747221be-8627-4dad-aaef-a7bec578b1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_f5037636-86fd-4b53-ac11-daa8478e1d59" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_747221be-8627-4dad-aaef-a7bec578b1ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_878ec751-6da4-4b4a-a592-39c29f510bba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_f5037636-86fd-4b53-ac11-daa8478e1d59" xlink:to="loc_us-gaap_NetIncomeLoss_878ec751-6da4-4b4a-a592-39c29f510bba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_1c97bcad-9060-456d-96b1-128d2a323fbe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_f5037636-86fd-4b53-ac11-daa8478e1d59" xlink:to="loc_us-gaap_StockholdersEquity_1c97bcad-9060-456d-96b1-128d2a323fbe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_a5fe356d-f080-405a-b399-4d80ec5fbdbc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_438f6026-646d-4125-9550-0073c9000974" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_a5fe356d-f080-405a-b399-4d80ec5fbdbc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_27b7868a-16b1-4457-8027-ecdc71fd6289" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_a5fe356d-f080-405a-b399-4d80ec5fbdbc" xlink:to="loc_srt_RestatementAxis_27b7868a-16b1-4457-8027-ecdc71fd6289" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_27b7868a-16b1-4457-8027-ecdc71fd6289_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_27b7868a-16b1-4457-8027-ecdc71fd6289" xlink:to="loc_srt_RestatementDomain_27b7868a-16b1-4457-8027-ecdc71fd6289_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_a6018b31-b29f-4c9f-9731-d02d3c82d794" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_27b7868a-16b1-4457-8027-ecdc71fd6289" xlink:to="loc_srt_RestatementDomain_a6018b31-b29f-4c9f-9731-d02d3c82d794" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_cf3168b2-31c9-4fdc-90b7-8c0803544699" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_a6018b31-b29f-4c9f-9731-d02d3c82d794" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_cf3168b2-31c9-4fdc-90b7-8c0803544699" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_8a417167-1140-44ec-8a37-bab52f1da083" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_a6018b31-b29f-4c9f-9731-d02d3c82d794" xlink:to="loc_srt_RestatementAdjustmentMember_8a417167-1140-44ec-8a37-bab52f1da083" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedStatementofCashFlowsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SummaryofSignificantAccountingPoliciesConsolidatedStatementofCashFlowsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SummaryofSignificantAccountingPoliciesConsolidatedStatementofCashFlowsDetails" xlink:type="extended" id="i65236b8ab1be4b1aa49f7e3b716acad9_SummaryofSignificantAccountingPoliciesConsolidatedStatementofCashFlowsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_e34caa0d-c55f-42bb-a19f-f596eb980d04" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_aad734af-4b21-41d6-a16c-36ab608ba489" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_e34caa0d-c55f-42bb-a19f-f596eb980d04" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_aad734af-4b21-41d6-a16c-36ab608ba489" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_89c93524-42eb-4eaf-98cb-47f24dd260e9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_aad734af-4b21-41d6-a16c-36ab608ba489" xlink:to="loc_us-gaap_NetIncomeLoss_89c93524-42eb-4eaf-98cb-47f24dd260e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4d18a147-bbdb-433f-8eb4-e40c4f545118" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_aad734af-4b21-41d6-a16c-36ab608ba489" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4d18a147-bbdb-433f-8eb4-e40c4f545118" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_GainLossOnChangesInFairValueOfAssetsAndLiabilities_c4d98dac-9f5f-4e2b-a881-3c443b7cc604" xlink:href="afrm-20220630.xsd#afrm_GainLossOnChangesInFairValueOfAssetsAndLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4d18a147-bbdb-433f-8eb4-e40c4f545118" xlink:to="loc_afrm_GainLossOnChangesInFairValueOfAssetsAndLiabilities_c4d98dac-9f5f-4e2b-a881-3c443b7cc604" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_8a94b421-e13b-4f09-ad8a-2a19022e66f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_4d18a147-bbdb-433f-8eb4-e40c4f545118" xlink:to="loc_us-gaap_ShareBasedCompensation_8a94b421-e13b-4f09-ad8a-2a19022e66f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c71a604e-313a-462d-beeb-a257d7b27d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_e34caa0d-c55f-42bb-a19f-f596eb980d04" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c71a604e-313a-462d-beeb-a257d7b27d5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_ef4c737b-d94e-4137-8be5-a209bc894243" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_e34caa0d-c55f-42bb-a19f-f596eb980d04" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_ef4c737b-d94e-4137-8be5-a209bc894243" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_069a41a0-f331-4c29-a339-615c7f71b6ee" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_ef4c737b-d94e-4137-8be5-a209bc894243" xlink:to="loc_srt_RestatementAxis_069a41a0-f331-4c29-a339-615c7f71b6ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_069a41a0-f331-4c29-a339-615c7f71b6ee_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_069a41a0-f331-4c29-a339-615c7f71b6ee" xlink:to="loc_srt_RestatementDomain_069a41a0-f331-4c29-a339-615c7f71b6ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_3efbd2aa-68ae-45fc-aab5-cc14ec7019c0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_069a41a0-f331-4c29-a339-615c7f71b6ee" xlink:to="loc_srt_RestatementDomain_3efbd2aa-68ae-45fc-aab5-cc14ec7019c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_b313502b-2744-4215-9a85-9a0673ecc750" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_3efbd2aa-68ae-45fc-aab5-cc14ec7019c0" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_b313502b-2744-4215-9a85-9a0673ecc750" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_962364f2-b39e-4f51-b010-b515a0887cb3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_3efbd2aa-68ae-45fc-aab5-cc14ec7019c0" xlink:to="loc_srt_RestatementAdjustmentMember_962364f2-b39e-4f51-b010-b515a0887cb3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#LoansHeldforInvestmentandAllowanceforCreditLossesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesAdditionalInformationDetails" xlink:type="extended" id="i1241a3e6a72542f79109ba610169b007_LoansHeldforInvestmentandAllowanceforCreditLossesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossLoanPurchased_d865da1f-ffdf-486f-839c-2060b5bc584f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossLoanPurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossLoanPurchased_d865da1f-ffdf-486f-839c-2060b5bc584f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableLoanTerm_a527dbe0-5c3e-46bd-b060-68fe5a3ff1d1" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableLoanTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:to="loc_afrm_FinancingReceivableLoanTerm_a527dbe0-5c3e-46bd-b060-68fe5a3ff1d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableITACCreditQualityIndicator_6a4c7e0e-ae36-4983-bc8a-8d050f495e32" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableITACCreditQualityIndicator"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:to="loc_afrm_FinancingReceivableITACCreditQualityIndicator_6a4c7e0e-ae36-4983-bc8a-8d050f495e32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableThresholdPeriodPastDue_25f88a1f-27df-4298-8be9-e18f9598e396" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableThresholdPeriodPastDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:to="loc_us-gaap_FinancingReceivableThresholdPeriodPastDue_25f88a1f-27df-4298-8be9-e18f9598e396" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff_52ee74a5-2b13-47af-810c-353d0df60b1c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:to="loc_us-gaap_FinancingReceivableThresholdPeriodPastDueWriteoff_52ee74a5-2b13-47af-810c-353d0df60b1c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_af1d9eb0-8520-44c0-ac22-c3563b0eb4df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_47234018-d5fb-49ad-bfe2-9d8d8c3b2439" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_af1d9eb0-8520-44c0-ac22-c3563b0eb4df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_be132f8c-1daa-468f-90b7-b80cdaf72fef" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_af1d9eb0-8520-44c0-ac22-c3563b0eb4df" xlink:to="loc_srt_RangeAxis_be132f8c-1daa-468f-90b7-b80cdaf72fef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_be132f8c-1daa-468f-90b7-b80cdaf72fef_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_be132f8c-1daa-468f-90b7-b80cdaf72fef" xlink:to="loc_srt_RangeMember_be132f8c-1daa-468f-90b7-b80cdaf72fef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_58f8126c-2942-41dd-a90d-72618cb60341" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_be132f8c-1daa-468f-90b7-b80cdaf72fef" xlink:to="loc_srt_RangeMember_58f8126c-2942-41dd-a90d-72618cb60341" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a7afd0ad-4f92-474e-8e82-221e7e9cef2d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_58f8126c-2942-41dd-a90d-72618cb60341" xlink:to="loc_srt_MinimumMember_a7afd0ad-4f92-474e-8e82-221e7e9cef2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_8168c330-df4b-4895-88f9-a2a5f6cd5418" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_58f8126c-2942-41dd-a90d-72618cb60341" xlink:to="loc_srt_MaximumMember_8168c330-df4b-4895-88f9-a2a5f6cd5418" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesCreditQualitybyITACsScoreDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#LoansHeldforInvestmentandAllowanceforCreditLossesCreditQualitybyITACsScoreDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesCreditQualitybyITACsScoreDetails" xlink:type="extended" id="ie04e747e8b5349d0840171113c5d88f2_LoansHeldforInvestmentandAllowanceforCreditLossesCreditQualitybyITACsScoreDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_598e8115-e0e6-435b-a018-b8ac2766b051" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_598e8115-e0e6-435b-a018-b8ac2766b051" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_8b75db0b-cb27-44bd-a57a-2e5b0aac5f5e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_8b75db0b-cb27-44bd-a57a-2e5b0aac5f5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_41af7acc-48a0-4ece-be1f-5c65f8915866" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_41af7acc-48a0-4ece-be1f-5c65f8915866" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_3f2eab96-ed0c-4e39-9d2a-9a29e1fd7a13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_3f2eab96-ed0c-4e39-9d2a-9a29e1fd7a13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_e9dec090-0c0d-48c3-bb67-1171c698487c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_e9dec090-0c0d-48c3-bb67-1171c698487c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_340b31ac-7286-4429-81ec-ce5b4e5ed6c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_340b31ac-7286-4429-81ec-ce5b4e5ed6c3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableAmortizedCostBeforeAllowanceForCreditLoss_1ab20f0b-bf0d-479c-9057-08ba0074de19" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableAmortizedCostBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableAmortizedCostBeforeAllowanceForCreditLoss_1ab20f0b-bf0d-479c-9057-08ba0074de19" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteOff_fef5ac2a-d08a-4e0f-8d19-4c667c66f740" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteOff_fef5ac2a-d08a-4e0f-8d19-4c667c66f740" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOff_51da98e7-0fd4-4e87-99bd-6445af4b0e0f" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOff_51da98e7-0fd4-4e87-99bd-6445af4b0e0f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOff_fe13dbc3-e92e-4452-93f6-df541acd73e3" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOff_fe13dbc3-e92e-4452-93f6-df541acd73e3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOff_d26a2ffa-f56f-4435-ac5a-991b189fd6b8" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOff_d26a2ffa-f56f-4435-ac5a-991b189fd6b8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOff_8cdd862e-f2f2-4c3e-abb6-6dedacce45eb" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOff_8cdd862e-f2f2-4c3e-abb6-6dedacce45eb" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOff_de05fa09-d054-4413-a695-0d43a2f28771" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOff_de05fa09-d054-4413-a695-0d43a2f28771" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableWriteOff_f05ce661-101a-40b1-98d8-99ecea12cdd1" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableWriteOff_f05ce661-101a-40b1-98d8-99ecea12cdd1" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearRecoveries_e1b8cd97-7d71-449e-8001-8578e3119ff8" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearRecoveries_e1b8cd97-7d71-449e-8001-8578e3119ff8" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearRecoveries_d583d1d7-453b-4c7c-8764-3584ea1a9aba" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearRecoveries_d583d1d7-453b-4c7c-8764-3584ea1a9aba" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearRecoveries_f66b4fe0-7ae7-4e0c-b99a-320350f6fcc0" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearRecoveries_f66b4fe0-7ae7-4e0c-b99a-320350f6fcc0" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearRecoveries_5a194f2b-d6fa-4cfd-90d2-dce6d679269f" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearRecoveries_5a194f2b-d6fa-4cfd-90d2-dce6d679269f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearRecoveries_06462dd0-c86f-4102-ace6-15fc326305de" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearRecoveries_06462dd0-c86f-4102-ace6-15fc326305de" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearRecoveries_b4ddfc98-06c8-42ea-9084-6f661c355ba8" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearRecoveries_b4ddfc98-06c8-42ea-9084-6f661c355ba8" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableRecoveries_85b3f3e4-cb1b-4efc-a399-c1662df436c5" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableRecoveries_85b3f3e4-cb1b-4efc-a399-c1662df436c5" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteOffRecoveriesNet_9508672b-555e-4c76-8c06-f57f3e965ffe" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteOffRecoveriesNet_9508672b-555e-4c76-8c06-f57f3e965ffe" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOffRecoveriesNet_22fbcd5a-9989-409a-8014-bc24597a5ea0" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOffRecoveriesNet_22fbcd5a-9989-409a-8014-bc24597a5ea0" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_cdf8e8c6-58ba-4255-8e8b-ac8fedcd99ab" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_cdf8e8c6-58ba-4255-8e8b-ac8fedcd99ab" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_60fc735a-132d-4e75-aaa4-789908532c28" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_60fc735a-132d-4e75-aaa4-789908532c28" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_66192290-5732-4ea6-8411-b5765e05f5a1" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_66192290-5732-4ea6-8411-b5765e05f5a1" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_e47408b7-f66e-49a0-b693-f3d333682eb3" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOffRecoveriesNet_e47408b7-f66e-49a0-b693-f3d333682eb3" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivablesWriteOffRecoveriesNet_acba7f57-a19d-4da8-9d24-f689950779da" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivablesWriteOffRecoveriesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_afrm_FinancingReceivablesWriteOffRecoveriesNet_acba7f57-a19d-4da8-9d24-f689950779da" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_90497a34-ecb6-40d1-8829-ba61c55cc8d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d61bcf84-c528-4401-ac23-247e3421c920" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_90497a34-ecb6-40d1-8829-ba61c55cc8d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CreditScoreITACAxis_44f88586-66ce-4b86-b741-30a4ccd2ec42" xlink:href="afrm-20220630.xsd#afrm_CreditScoreITACAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_90497a34-ecb6-40d1-8829-ba61c55cc8d4" xlink:to="loc_afrm_CreditScoreITACAxis_44f88586-66ce-4b86-b741-30a4ccd2ec42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CreditScoreITACDomain_44f88586-66ce-4b86-b741-30a4ccd2ec42_default" xlink:href="afrm-20220630.xsd#afrm_CreditScoreITACDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_afrm_CreditScoreITACAxis_44f88586-66ce-4b86-b741-30a4ccd2ec42" xlink:to="loc_afrm_CreditScoreITACDomain_44f88586-66ce-4b86-b741-30a4ccd2ec42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:href="afrm-20220630.xsd#afrm_CreditScoreITACDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_afrm_CreditScoreITACAxis_44f88586-66ce-4b86-b741-30a4ccd2ec42" xlink:to="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ITACScoreGreaterThan96Member_bd1a76ab-7967-430e-bd81-4c81e0cbe52a" xlink:href="afrm-20220630.xsd#afrm_ITACScoreGreaterThan96Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:to="loc_afrm_ITACScoreGreaterThan96Member_bd1a76ab-7967-430e-bd81-4c81e0cbe52a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ITACScore94To96Member_7f8c6521-cfb1-4240-b41b-5d262404e728" xlink:href="afrm-20220630.xsd#afrm_ITACScore94To96Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:to="loc_afrm_ITACScore94To96Member_7f8c6521-cfb1-4240-b41b-5d262404e728" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ITACScore90To94Member_62a58a4c-ba9a-43c0-b9ca-387320911820" xlink:href="afrm-20220630.xsd#afrm_ITACScore90To94Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:to="loc_afrm_ITACScore90To94Member_62a58a4c-ba9a-43c0-b9ca-387320911820" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ITACScoreLessThan90Member_082d3e6a-3136-48d8-9fc1-9459506606df" xlink:href="afrm-20220630.xsd#afrm_ITACScoreLessThan90Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:to="loc_afrm_ITACScoreLessThan90Member_082d3e6a-3136-48d8-9fc1-9459506606df" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ITACScoreNoScoreMember_6ab2efd4-54f3-498c-a437-87cc16b52a72" xlink:href="afrm-20220630.xsd#afrm_ITACScoreNoScoreMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CreditScoreITACDomain_f4dd908e-985e-4b77-b193-995e516c9cef" xlink:to="loc_afrm_ITACScoreNoScoreMember_6ab2efd4-54f3-498c-a437-87cc16b52a72" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesUnpaidPrincipalBalanceforLoansHeldforInvestmentDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#LoansHeldforInvestmentandAllowanceforCreditLossesUnpaidPrincipalBalanceforLoansHeldforInvestmentDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesUnpaidPrincipalBalanceforLoansHeldforInvestmentDetails" xlink:type="extended" id="i2cee61dd3a064627beff66c720d6d4f9_LoansHeldforInvestmentandAllowanceforCreditLossesUnpaidPrincipalBalanceforLoansHeldforInvestmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bfa36aba-25c6-4fa2-834d-48028e342bad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_68f69587-060b-48bc-bab2-1506c20a7cae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bfa36aba-25c6-4fa2-834d-48028e342bad" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_68f69587-060b-48bc-bab2-1506c20a7cae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableAmortizedCostBeforeAllowanceForCreditLoss_6127f37c-13b6-4b08-a33d-c2d4f2b1466f" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableAmortizedCostBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bfa36aba-25c6-4fa2-834d-48028e342bad" xlink:to="loc_afrm_FinancingReceivableAmortizedCostBeforeAllowanceForCreditLoss_6127f37c-13b6-4b08-a33d-c2d4f2b1466f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_c0b1871e-7d7e-4642-9573-5a9f7cf6716b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bfa36aba-25c6-4fa2-834d-48028e342bad" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_c0b1871e-7d7e-4642-9573-5a9f7cf6716b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_1deb83d0-125b-4ef6-99b8-5b36b57ec017" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bfa36aba-25c6-4fa2-834d-48028e342bad" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_1deb83d0-125b-4ef6-99b8-5b36b57ec017" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_f7dc4595-8596-4208-936c-89b83855e512" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_1deb83d0-125b-4ef6-99b8-5b36b57ec017" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_f7dc4595-8596-4208-936c-89b83855e512" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_f7dc4595-8596-4208-936c-89b83855e512_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_f7dc4595-8596-4208-936c-89b83855e512" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_f7dc4595-8596-4208-936c-89b83855e512_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_f7dc4595-8596-4208-936c-89b83855e512" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_0848ca4b-9e2d-4db2-84ee-a487cbbf1fd5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_0848ca4b-9e2d-4db2-84ee-a487cbbf1fd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancialAsset4To29DaysPastDueMember_fbb8a4f2-ab34-4b85-8922-e270e1ae881a" xlink:href="afrm-20220630.xsd#afrm_FinancialAsset4To29DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:to="loc_afrm_FinancialAsset4To29DaysPastDueMember_fbb8a4f2-ab34-4b85-8922-e270e1ae881a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_87fb6ef2-b77a-4039-af7a-3f9e9ac6d2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:to="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_87fb6ef2-b77a-4039-af7a-3f9e9ac6d2fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_adf2b028-7096-4031-b312-e05ec98cf1b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:to="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_adf2b028-7096-4031-b312-e05ec98cf1b8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5534dd00-db89-493b-9659-b72f1df7f740" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_899e68a0-2bff-4b78-9411-c8a27ec88234" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5534dd00-db89-493b-9659-b72f1df7f740" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesAllowanceforCreditLossDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#LoansHeldforInvestmentandAllowanceforCreditLossesAllowanceforCreditLossDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/LoansHeldforInvestmentandAllowanceforCreditLossesAllowanceforCreditLossDetails" xlink:type="extended" id="i93afa5f26c954c259d73a67a9ac3718d_LoansHeldforInvestmentandAllowanceforCreditLossesAllowanceforCreditLossDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_655f39b6-d940-4d5e-b81b-8f51288e120a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_141e2fae-37b8-4439-b968-f75f57f15b73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_655f39b6-d940-4d5e-b81b-8f51288e120a" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_141e2fae-37b8-4439-b968-f75f57f15b73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_10c2e93c-25a5-4c2b-b28a-3521d2635974" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_141e2fae-37b8-4439-b968-f75f57f15b73" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_10c2e93c-25a5-4c2b-b28a-3521d2635974" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversalExcludingCertainProvisions_d896ae3f-3240-450a-9b59-9f373a5ed137" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversalExcludingCertainProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_141e2fae-37b8-4439-b968-f75f57f15b73" xlink:to="loc_afrm_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversalExcludingCertainProvisions_d896ae3f-3240-450a-9b59-9f373a5ed137" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_dad3a7b3-21a5-459a-acf8-0442bafea390" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_141e2fae-37b8-4439-b968-f75f57f15b73" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_dad3a7b3-21a5-459a-acf8-0442bafea390" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_01f514b7-397b-4c5e-81ce-10c06fca0332" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_141e2fae-37b8-4439-b968-f75f57f15b73" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_01f514b7-397b-4c5e-81ce-10c06fca0332" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_84563738-6266-463a-b5cb-0230743cf679" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_d94009cc-264e-449b-9b8c-030e7ac75d69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_655f39b6-d940-4d5e-b81b-8f51288e120a" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_d94009cc-264e-449b-9b8c-030e7ac75d69" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_3a8beaa8-d415-4c5c-8fff-5068eec8a4d3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_d94009cc-264e-449b-9b8c-030e7ac75d69" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_3a8beaa8-d415-4c5c-8fff-5068eec8a4d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_3a8beaa8-d415-4c5c-8fff-5068eec8a4d3_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_3a8beaa8-d415-4c5c-8fff-5068eec8a4d3" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_3a8beaa8-d415-4c5c-8fff-5068eec8a4d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_559fbc9d-07fe-4154-ae87-1bec95a80316" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_3a8beaa8-d415-4c5c-8fff-5068eec8a4d3" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_559fbc9d-07fe-4154-ae87-1bec95a80316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_3fbd0fd8-a3a9-4761-b370-835fa793f4d0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_559fbc9d-07fe-4154-ae87-1bec95a80316" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_3fbd0fd8-a3a9-4761-b370-835fa793f4d0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/AcquisitionsAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#AcquisitionsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/AcquisitionsAdditionalInformationDetails" xlink:type="extended" id="i03563b9e0f4d4a1caab70c6c4ecac69c_AcquisitionsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_2f2e26e9-74e7-4928-84d5-2275d53e39b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_2f2e26e9-74e7-4928-84d5-2275d53e39b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AssetAcquisitionForgivenessOfLongTermDebt_1b3c2632-f252-42b9-81f6-664876a1b5e7" xlink:href="afrm-20220630.xsd#afrm_AssetAcquisitionForgivenessOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_afrm_AssetAcquisitionForgivenessOfLongTermDebt_1b3c2632-f252-42b9-81f6-664876a1b5e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_eab8781c-4dec-4836-b3f8-78ab270c47a1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_eab8781c-4dec-4836-b3f8-78ab270c47a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AssetAcquisitionTransactionCosts_c55367ae-627e-4f7b-b62b-f38b347257dc" xlink:href="afrm-20220630.xsd#afrm_AssetAcquisitionTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_afrm_AssetAcquisitionTransactionCosts_c55367ae-627e-4f7b-b62b-f38b347257dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_1d1d6fdf-009d-4e2e-a6eb-2f059834fa1d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_1d1d6fdf-009d-4e2e-a6eb-2f059834fa1d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_95228a80-fd61-4880-a842-73027abf36ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_95228a80-fd61-4880-a842-73027abf36ca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_95edfc70-df22-4ac2-940e-ec74c74f1739" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_95edfc70-df22-4ac2-940e-ec74c74f1739" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_d1192769-758b-42b4-b2cf-7b15b6f1036d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_d1192769-758b-42b4-b2cf-7b15b6f1036d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_b785a063-e95b-471a-b23f-429a59706f2e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_b785a063-e95b-471a-b23f-429a59706f2e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EscrowDeposit_ecf679fd-8ded-4069-b555-4f75ae1e6d76" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EscrowDeposit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_EscrowDeposit_ecf679fd-8ded-4069-b555-4f75ae1e6d76" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_543e2b7d-f8be-4e82-b41d-5494f011307a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_543e2b7d-f8be-4e82-b41d-5494f011307a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage_38f81498-c2ce-4e27-a3d9-fdd93fc19088" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage_38f81498-c2ce-4e27-a3d9-fdd93fc19088" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesContingentConsideration_f10003db-d916-4d05-a4e9-17d13e4f4410" xlink:href="afrm-20220630.xsd#afrm_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_afrm_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesContingentConsideration_f10003db-d916-4d05-a4e9-17d13e4f4410" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1_f8a8795b-53cc-48f7-81c2-131bae5737c7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1_f8a8795b-53cc-48f7-81c2-131bae5737c7" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_f4b0abcd-466d-4fd0-b3cd-ef5f7c25db66" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_f4b0abcd-466d-4fd0-b3cd-ef5f7c25db66" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_d3e6ec42-b60f-4dc0-ac4d-7c529976287c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_d3e6ec42-b60f-4dc0-ac4d-7c529976287c" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8328753b-3ed3-431c-bbe0-3ed1a77c5f87" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_bd88d502-495f-42d4-a318-34a915474ca7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:to="loc_us-gaap_AssetAcquisitionAxis_bd88d502-495f-42d4-a318-34a915474ca7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_bd88d502-495f-42d4-a318-34a915474ca7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_bd88d502-495f-42d4-a318-34a915474ca7" xlink:to="loc_us-gaap_AssetAcquisitionDomain_bd88d502-495f-42d4-a318-34a915474ca7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_74a8bb4d-0c48-4cb5-bad2-6db476e6864d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_bd88d502-495f-42d4-a318-34a915474ca7" xlink:to="loc_us-gaap_AssetAcquisitionDomain_74a8bb4d-0c48-4cb5-bad2-6db476e6864d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FastAFIncMember_c3037da2-60d1-42f6-a318-7271f50660e9" xlink:href="afrm-20220630.xsd#afrm_FastAFIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_74a8bb4d-0c48-4cb5-bad2-6db476e6864d" xlink:to="loc_afrm_FastAFIncMember_c3037da2-60d1-42f6-a318-7271f50660e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_ab15d90f-41d8-4f78-a1eb-6461126cb3db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_ab15d90f-41d8-4f78-a1eb-6461126cb3db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ab15d90f-41d8-4f78-a1eb-6461126cb3db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ab15d90f-41d8-4f78-a1eb-6461126cb3db" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ab15d90f-41d8-4f78-a1eb-6461126cb3db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a2e59619-e1d7-40ec-b0a4-ce93313edaf9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ab15d90f-41d8-4f78-a1eb-6461126cb3db" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a2e59619-e1d7-40ec-b0a4-ce93313edaf9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShopBrainMember_0583b189-f163-4092-b88e-56c5117ba266" xlink:href="afrm-20220630.xsd#afrm_ShopBrainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a2e59619-e1d7-40ec-b0a4-ce93313edaf9" xlink:to="loc_afrm_ShopBrainMember_0583b189-f163-4092-b88e-56c5117ba266" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ManhattanEngineeringIncMember_26595f39-0afb-4d7c-898f-22663be5a3b7" xlink:href="afrm-20220630.xsd#afrm_ManhattanEngineeringIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a2e59619-e1d7-40ec-b0a4-ce93313edaf9" xlink:to="loc_afrm_ManhattanEngineeringIncMember_26595f39-0afb-4d7c-898f-22663be5a3b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ReturnlyTechnologiesIncMember_06b93871-a104-4ee8-85b7-1734f0b746e9" xlink:href="afrm-20220630.xsd#afrm_ReturnlyTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a2e59619-e1d7-40ec-b0a4-ce93313edaf9" xlink:to="loc_afrm_ReturnlyTechnologiesIncMember_06b93871-a104-4ee8-85b7-1734f0b746e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PayBrightMember_f25767f5-643c-4678-959e-59facaaac563" xlink:href="afrm-20220630.xsd#afrm_PayBrightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a2e59619-e1d7-40ec-b0a4-ce93313edaf9" xlink:to="loc_afrm_PayBrightMember_f25767f5-643c-4678-959e-59facaaac563" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_858ae66a-f1f2-4773-852a-d63e4f695739" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:to="loc_us-gaap_StatementClassOfStockAxis_858ae66a-f1f2-4773-852a-d63e4f695739" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_858ae66a-f1f2-4773-852a-d63e4f695739_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_858ae66a-f1f2-4773-852a-d63e4f695739" xlink:to="loc_us-gaap_ClassOfStockDomain_858ae66a-f1f2-4773-852a-d63e4f695739_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_0a22ecc6-31a8-43f6-8a3b-062abd08aebe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_858ae66a-f1f2-4773-852a-d63e4f695739" xlink:to="loc_us-gaap_ClassOfStockDomain_0a22ecc6-31a8-43f6-8a3b-062abd08aebe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_138b6750-5324-4fe8-85a1-40dbf33989e0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_0a22ecc6-31a8-43f6-8a3b-062abd08aebe" xlink:to="loc_us-gaap_CommonClassAMember_138b6750-5324-4fe8-85a1-40dbf33989e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_b0d7a6b3-5961-42e3-80bf-4762ad1c3b28" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_0a22ecc6-31a8-43f6-8a3b-062abd08aebe" xlink:to="loc_us-gaap_CommonClassBMember_b0d7a6b3-5961-42e3-80bf-4762ad1c3b28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_c841408e-58b0-40b5-95e7-05e9a0caa247" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:to="loc_us-gaap_DebtInstrumentAxis_c841408e-58b0-40b5-95e7-05e9a0caa247" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c841408e-58b0-40b5-95e7-05e9a0caa247_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_c841408e-58b0-40b5-95e7-05e9a0caa247" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c841408e-58b0-40b5-95e7-05e9a0caa247_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b3eb97b5-498c-4d0a-835e-ed111ccfc135" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_c841408e-58b0-40b5-95e7-05e9a0caa247" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b3eb97b5-498c-4d0a-835e-ed111ccfc135" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SeniorSecuredNoteIssuedToFastAFIncMember_612aaf9e-d346-4d65-b594-177a9ac13da5" xlink:href="afrm-20220630.xsd#afrm_SeniorSecuredNoteIssuedToFastAFIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b3eb97b5-498c-4d0a-835e-ed111ccfc135" xlink:to="loc_afrm_SeniorSecuredNoteIssuedToFastAFIncMember_612aaf9e-d346-4d65-b594-177a9ac13da5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_8b15cb7f-73e2-4eca-b9cb-e4299dfd213e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_8b15cb7f-73e2-4eca-b9cb-e4299dfd213e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8b15cb7f-73e2-4eca-b9cb-e4299dfd213e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8b15cb7f-73e2-4eca-b9cb-e4299dfd213e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8b15cb7f-73e2-4eca-b9cb-e4299dfd213e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_31b69f3f-5d0c-49d8-aa6d-54290be258a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8b15cb7f-73e2-4eca-b9cb-e4299dfd213e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_31b69f3f-5d0c-49d8-aa6d-54290be258a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_1e4dacb3-6f50-4a17-b49f-1c8f2affc615" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_31b69f3f-5d0c-49d8-aa6d-54290be258a4" xlink:to="loc_us-gaap_SeniorNotesMember_1e4dacb3-6f50-4a17-b49f-1c8f2affc615" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6096126-6f95-4462-b8b6-7bcd5d78fa6b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1f0920f2-89c2-4ea1-b3a6-45f2c9581bb4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6096126-6f95-4462-b8b6-7bcd5d78fa6b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6096126-6f95-4462-b8b6-7bcd5d78fa6b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6096126-6f95-4462-b8b6-7bcd5d78fa6b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6096126-6f95-4462-b8b6-7bcd5d78fa6b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d1067205-736d-4ec3-a270-0aac9f4c3386" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6096126-6f95-4462-b8b6-7bcd5d78fa6b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d1067205-736d-4ec3-a270-0aac9f4c3386" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AssembledWorkforceMember_1b23fba5-29ae-43d2-94f8-c31163852016" xlink:href="afrm-20220630.xsd#afrm_AssembledWorkforceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d1067205-736d-4ec3-a270-0aac9f4c3386" xlink:to="loc_afrm_AssembledWorkforceMember_1b23fba5-29ae-43d2-94f8-c31163852016" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/AcquisitionsIdentifiableIntangibleAssetsAcquiredDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#AcquisitionsIdentifiableIntangibleAssetsAcquiredDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/AcquisitionsIdentifiableIntangibleAssetsAcquiredDetails" xlink:type="extended" id="i29eb5339765e4893853b256a77682bec_AcquisitionsIdentifiableIntangibleAssetsAcquiredDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_5238e486-601d-464d-bd17-e994e6a2766d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_397f9049-e549-4d84-94f8-dc7a8e1aeb95" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5238e486-601d-464d-bd17-e994e6a2766d" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_397f9049-e549-4d84-94f8-dc7a8e1aeb95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_531468db-659c-46e4-9a8d-9c666f2802e0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5238e486-601d-464d-bd17-e994e6a2766d" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_531468db-659c-46e4-9a8d-9c666f2802e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1d4e7115-d697-486c-a915-bfcfbe675a21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5238e486-601d-464d-bd17-e994e6a2766d" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1d4e7115-d697-486c-a915-bfcfbe675a21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_f89f9dca-42dd-4100-95cb-5c9b2c2054d1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1d4e7115-d697-486c-a915-bfcfbe675a21" xlink:to="loc_us-gaap_AssetAcquisitionAxis_f89f9dca-42dd-4100-95cb-5c9b2c2054d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_f89f9dca-42dd-4100-95cb-5c9b2c2054d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_f89f9dca-42dd-4100-95cb-5c9b2c2054d1" xlink:to="loc_us-gaap_AssetAcquisitionDomain_f89f9dca-42dd-4100-95cb-5c9b2c2054d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_30baa24b-301a-4073-8900-7dd621545e08" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_f89f9dca-42dd-4100-95cb-5c9b2c2054d1" xlink:to="loc_us-gaap_AssetAcquisitionDomain_30baa24b-301a-4073-8900-7dd621545e08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FastAFIncMember_a5185af6-d4aa-40bd-99b6-2f052b9a827f" xlink:href="afrm-20220630.xsd#afrm_FastAFIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_30baa24b-301a-4073-8900-7dd621545e08" xlink:to="loc_afrm_FastAFIncMember_a5185af6-d4aa-40bd-99b6-2f052b9a827f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_935dea0a-ffe1-4a9d-82f7-4442d504df31" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1d4e7115-d697-486c-a915-bfcfbe675a21" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_935dea0a-ffe1-4a9d-82f7-4442d504df31" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_935dea0a-ffe1-4a9d-82f7-4442d504df31_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_935dea0a-ffe1-4a9d-82f7-4442d504df31" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_935dea0a-ffe1-4a9d-82f7-4442d504df31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_caa8b00c-7c46-4831-90eb-540a06bd029c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_935dea0a-ffe1-4a9d-82f7-4442d504df31" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_caa8b00c-7c46-4831-90eb-540a06bd029c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShopBrainMember_e083fe4e-72c9-4185-b7d3-51b1914defd3" xlink:href="afrm-20220630.xsd#afrm_ShopBrainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_caa8b00c-7c46-4831-90eb-540a06bd029c" xlink:to="loc_afrm_ShopBrainMember_e083fe4e-72c9-4185-b7d3-51b1914defd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ManhattanEngineeringIncMember_ab448c3d-eadc-4e00-94c3-df0b75bb21a4" xlink:href="afrm-20220630.xsd#afrm_ManhattanEngineeringIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_caa8b00c-7c46-4831-90eb-540a06bd029c" xlink:to="loc_afrm_ManhattanEngineeringIncMember_ab448c3d-eadc-4e00-94c3-df0b75bb21a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ReturnlyTechnologiesIncMember_170e761b-cf23-4369-abe2-249a93484fc3" xlink:href="afrm-20220630.xsd#afrm_ReturnlyTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_caa8b00c-7c46-4831-90eb-540a06bd029c" xlink:to="loc_afrm_ReturnlyTechnologiesIncMember_170e761b-cf23-4369-abe2-249a93484fc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PayBrightMember_85a86c08-c48d-4304-80bc-d5fd06d86e84" xlink:href="afrm-20220630.xsd#afrm_PayBrightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_caa8b00c-7c46-4831-90eb-540a06bd029c" xlink:to="loc_afrm_PayBrightMember_85a86c08-c48d-4304-80bc-d5fd06d86e84" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_619b6274-03f3-4335-839f-77b5ec74064e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1d4e7115-d697-486c-a915-bfcfbe675a21" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_619b6274-03f3-4335-839f-77b5ec74064e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_619b6274-03f3-4335-839f-77b5ec74064e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_619b6274-03f3-4335-839f-77b5ec74064e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_619b6274-03f3-4335-839f-77b5ec74064e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_619b6274-03f3-4335-839f-77b5ec74064e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AssembledWorkforceMember_0699fd87-937f-4379-a761-725d316b4773" xlink:href="afrm-20220630.xsd#afrm_AssembledWorkforceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:to="loc_afrm_AssembledWorkforceMember_0699fd87-937f-4379-a761-725d316b4773" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_c6e28b78-3f11-4146-93f8-a2774249f1e0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_c6e28b78-3f11-4146-93f8-a2774249f1e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_c38ab3eb-bc53-4a74-b10b-9b2fdca241ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:to="loc_us-gaap_TrademarksMember_c38ab3eb-bc53-4a74-b10b-9b2fdca241ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MerchantRelationshipsMember_6415e595-ae04-4b11-8231-9f16ff73323f" xlink:href="afrm-20220630.xsd#afrm_MerchantRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:to="loc_afrm_MerchantRelationshipsMember_6415e595-ae04-4b11-8231-9f16ff73323f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_98e14b25-d6a8-4585-9173-579167884405" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da7908eb-af22-4ee5-b73f-2e8e52f284fa" xlink:to="loc_us-gaap_TradeNamesMember_98e14b25-d6a8-4585-9173-579167884405" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/AcquisitionsFairValueofConsiderationTransferredDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#AcquisitionsFairValueofConsiderationTransferredDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/AcquisitionsFairValueofConsiderationTransferredDetails" xlink:type="extended" id="i549d3043dbfd4557be84fef2a3cf6d44_AcquisitionsFairValueofConsiderationTransferredDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_370e5b4d-f99d-4824-9f48-e4ee620fc8f6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_370e5b4d-f99d-4824-9f48-e4ee620fc8f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_2e69ed22-1f79-4b85-adbc-b7e8255dd3d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_2e69ed22-1f79-4b85-adbc-b7e8255dd3d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationContingentConsiderationAssets_03a4f654-506f-409b-a7ff-e283871c5a7f" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationContingentConsiderationAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:to="loc_afrm_BusinessCombinationContingentConsiderationAssets_03a4f654-506f-409b-a7ff-e283871c5a7f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_a194dc9d-4558-4895-96e9-c856dc716b67" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_a194dc9d-4558-4895-96e9-c856dc716b67" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_d897c341-7cdb-4edf-9a94-1b098c692212" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_d897c341-7cdb-4edf-9a94-1b098c692212" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_56bdc169-f1f3-4d13-be7e-0d2288932900" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4e1b537d-0574-4e06-b7ac-84be76ad4edb" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_56bdc169-f1f3-4d13-be7e-0d2288932900" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_0f99f3bc-d6a5-4202-b5f6-276e07056788" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_56bdc169-f1f3-4d13-be7e-0d2288932900" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_0f99f3bc-d6a5-4202-b5f6-276e07056788" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0f99f3bc-d6a5-4202-b5f6-276e07056788_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_0f99f3bc-d6a5-4202-b5f6-276e07056788" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0f99f3bc-d6a5-4202-b5f6-276e07056788_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_479a6e93-94f1-4211-912c-6e74b01f31e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_0f99f3bc-d6a5-4202-b5f6-276e07056788" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_479a6e93-94f1-4211-912c-6e74b01f31e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShopBrainMember_53f97831-1640-413a-879d-770b78e07513" xlink:href="afrm-20220630.xsd#afrm_ShopBrainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_479a6e93-94f1-4211-912c-6e74b01f31e5" xlink:to="loc_afrm_ShopBrainMember_53f97831-1640-413a-879d-770b78e07513" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ManhattanEngineeringIncMember_925d8dbe-cc25-4ca6-a1e6-f3b8dd8e5ea4" xlink:href="afrm-20220630.xsd#afrm_ManhattanEngineeringIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_479a6e93-94f1-4211-912c-6e74b01f31e5" xlink:to="loc_afrm_ManhattanEngineeringIncMember_925d8dbe-cc25-4ca6-a1e6-f3b8dd8e5ea4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ReturnlyTechnologiesIncMember_5dfa16a5-06aa-471e-bfde-a1ba97bf7f11" xlink:href="afrm-20220630.xsd#afrm_ReturnlyTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_479a6e93-94f1-4211-912c-6e74b01f31e5" xlink:to="loc_afrm_ReturnlyTechnologiesIncMember_5dfa16a5-06aa-471e-bfde-a1ba97bf7f11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PayBrightMember_ac3b2978-8e94-4821-a50b-9852ebe5f59b" xlink:href="afrm-20220630.xsd#afrm_PayBrightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_479a6e93-94f1-4211-912c-6e74b01f31e5" xlink:to="loc_afrm_PayBrightMember_ac3b2978-8e94-4821-a50b-9852ebe5f59b" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/AcquisitionsAllocationofConsiderationPaidtoFairValuesofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#AcquisitionsAllocationofConsiderationPaidtoFairValuesofAssetsAcquiredandLiabilitiesAssumedDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/AcquisitionsAllocationofConsiderationPaidtoFairValuesofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended" id="ie85ef091f0344b49902f9c891ee2d40d_AcquisitionsAllocationofConsiderationPaidtoFairValuesofAssetsAcquiredandLiabilitiesAssumedDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_62651080-fcc7-4a74-b8d8-83cf9a000423" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_62651080-fcc7-4a74-b8d8-83cf9a000423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash_3a54ac98-cc2b-4550-b81a-017c7af16241" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash_3a54ac98-cc2b-4550-b81a-017c7af16241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancingReceivableBeforeAllowanceForCreditLoss_be1a92b8-b20e-4009-ace5-bf030598fcf0" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancingReceivableBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancingReceivableBeforeAllowanceForCreditLoss_be1a92b8-b20e-4009-ace5-bf030598fcf0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsReceivables_a763685f-7f45-4220-af0a-90aeea0af7f0" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsReceivables_a763685f-7f45-4220-af0a-90aeea0af7f0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_6c6105e5-2549-45bd-a887-dfadf73dd556" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_6c6105e5-2549-45bd-a887-dfadf73dd556" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_6a393570-2e40-41ea-8157-18fd34011848" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_6a393570-2e40-41ea-8157-18fd34011848" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets_f1be7a4d-21cd-4fd0-b9d6-ec8cd99bbbc7" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets_f1be7a4d-21cd-4fd0-b9d6-ec8cd99bbbc7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_a1b72668-2c6e-48d6-ba3f-d034bc308189" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_a1b72668-2c6e-48d6-ba3f-d034bc308189" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayable_cf84bafe-6074-481f-b922-ef0b2bff1147" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayable_cf84bafe-6074-481f-b922-ef0b2bff1147" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedInterest_0e607488-2862-4d2a-b8be-b4cd50185d34" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedInterest_0e607488-2862-4d2a-b8be-b4cd50185d34" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilitiesAndOtherLiabilities_9b7cc387-9142-4dfc-958e-4726a702b0cb" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilitiesAndOtherLiabilities_9b7cc387-9142-4dfc-958e-4726a702b0cb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuredDebt_818fe8b8-fbe7-471d-aee8-bdd288e95da4" xlink:href="afrm-20220630.xsd#afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_afrm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuredDebt_818fe8b8-fbe7-471d-aee8-bdd288e95da4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_6a6dc7f8-4c12-46ef-af7c-0e2719df8cd4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_6a6dc7f8-4c12-46ef-af7c-0e2719df8cd4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_0dafae92-b2ae-450f-8596-6dc491e27be5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_0dafae92-b2ae-450f-8596-6dc491e27be5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_aae3a71f-6d9c-4071-b0f5-1fd5fd3494a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_Goodwill_aae3a71f-6d9c-4071-b0f5-1fd5fd3494a2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_b5dfe92a-c6fd-4e46-92f3-e4302dacb905" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_b5dfe92a-c6fd-4e46-92f3-e4302dacb905" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_cd25d606-d426-46e0-a3c7-95cc14255e14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ded9fe4e-d271-45bb-ad84-63b0bc2b94cf" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_cd25d606-d426-46e0-a3c7-95cc14255e14" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_14f92aa4-d0ff-446a-a0eb-eaa3a455a215" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_cd25d606-d426-46e0-a3c7-95cc14255e14" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_14f92aa4-d0ff-446a-a0eb-eaa3a455a215" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_14f92aa4-d0ff-446a-a0eb-eaa3a455a215_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_14f92aa4-d0ff-446a-a0eb-eaa3a455a215" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_14f92aa4-d0ff-446a-a0eb-eaa3a455a215_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_59381014-6d58-46be-b3c1-b91da2a1c98b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_14f92aa4-d0ff-446a-a0eb-eaa3a455a215" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_59381014-6d58-46be-b3c1-b91da2a1c98b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShopBrainMember_20f536f9-562b-408b-9578-1a8f03e2f588" xlink:href="afrm-20220630.xsd#afrm_ShopBrainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_59381014-6d58-46be-b3c1-b91da2a1c98b" xlink:to="loc_afrm_ShopBrainMember_20f536f9-562b-408b-9578-1a8f03e2f588" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ManhattanEngineeringIncMember_b1dc0118-4760-45b2-b019-1f06e3e11a96" xlink:href="afrm-20220630.xsd#afrm_ManhattanEngineeringIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_59381014-6d58-46be-b3c1-b91da2a1c98b" xlink:to="loc_afrm_ManhattanEngineeringIncMember_b1dc0118-4760-45b2-b019-1f06e3e11a96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ReturnlyTechnologiesIncMember_40ef3103-4168-4e5a-a3b0-4f0d1aaa7aaa" xlink:href="afrm-20220630.xsd#afrm_ReturnlyTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_59381014-6d58-46be-b3c1-b91da2a1c98b" xlink:to="loc_afrm_ReturnlyTechnologiesIncMember_40ef3103-4168-4e5a-a3b0-4f0d1aaa7aaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PayBrightMember_04e3a805-3b0e-43ba-af3d-449e99a9a73c" xlink:href="afrm-20220630.xsd#afrm_PayBrightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_59381014-6d58-46be-b3c1-b91da2a1c98b" xlink:to="loc_afrm_PayBrightMember_04e3a805-3b0e-43ba-af3d-449e99a9a73c" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/AcquisitionsProFormaInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#AcquisitionsProFormaInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/AcquisitionsProFormaInformationDetails" xlink:type="extended" id="i6c714f7d3bd54740957a23af8d6ebc5e_AcquisitionsProFormaInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_dbde5935-685c-4bd5-9a37-f83dba7572f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_68e71033-f77d-4095-ad55-020defef94ae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_dbde5935-685c-4bd5-9a37-f83dba7572f3" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_68e71033-f77d-4095-ad55-020defef94ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_2d970151-e952-4d59-994b-6f272aacacac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_dbde5935-685c-4bd5-9a37-f83dba7572f3" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_2d970151-e952-4d59-994b-6f272aacacac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d3dab00f-3d39-44dd-b8b0-5bdeaa4e07cd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_dbde5935-685c-4bd5-9a37-f83dba7572f3" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d3dab00f-3d39-44dd-b8b0-5bdeaa4e07cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_68a282ec-b394-4c35-b41d-8d4df0dc2e4a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d3dab00f-3d39-44dd-b8b0-5bdeaa4e07cd" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_68a282ec-b394-4c35-b41d-8d4df0dc2e4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_68a282ec-b394-4c35-b41d-8d4df0dc2e4a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_68a282ec-b394-4c35-b41d-8d4df0dc2e4a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_68a282ec-b394-4c35-b41d-8d4df0dc2e4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40ca909a-c03a-41aa-a489-44d5e71dfd74" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_68a282ec-b394-4c35-b41d-8d4df0dc2e4a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40ca909a-c03a-41aa-a489-44d5e71dfd74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ReturnlyTechnologiesIncMember_894b057c-88da-466b-808b-8c7a15901cb0" xlink:href="afrm-20220630.xsd#afrm_ReturnlyTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40ca909a-c03a-41aa-a489-44d5e71dfd74" xlink:to="loc_afrm_ReturnlyTechnologiesIncMember_894b057c-88da-466b-808b-8c7a15901cb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PayBrightMember_953629f2-55e8-4380-92dd-5bdfc4fc08c6" xlink:href="afrm-20220630.xsd#afrm_PayBrightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_40ca909a-c03a-41aa-a489-44d5e71dfd74" xlink:to="loc_afrm_PayBrightMember_953629f2-55e8-4380-92dd-5bdfc4fc08c6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/BalanceSheetComponentsPropertyEquipmentandSoftwareDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#BalanceSheetComponentsPropertyEquipmentandSoftwareDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/BalanceSheetComponentsPropertyEquipmentandSoftwareDetails" xlink:type="extended" id="ic217e3596aaa4e859deeeb5b7daebc12_BalanceSheetComponentsPropertyEquipmentandSoftwareDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_bdad81e9-04b0-411a-b26b-764b8965b95e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_a13bd184-874c-4d91-bbbc-259a1d239a92" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_bdad81e9-04b0-411a-b26b-764b8965b95e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_a13bd184-874c-4d91-bbbc-259a1d239a92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_55ab9c00-c446-4510-83b5-6ec95fa0baf4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_bdad81e9-04b0-411a-b26b-764b8965b95e" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_55ab9c00-c446-4510-83b5-6ec95fa0baf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_c69492be-f389-427d-a880-a92cafd02f9e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_bdad81e9-04b0-411a-b26b-764b8965b95e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_c69492be-f389-427d-a880-a92cafd02f9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_f11b82de-cb8b-4e39-9ef7-1b2b6936b6d6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_bdad81e9-04b0-411a-b26b-764b8965b95e" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_f11b82de-cb8b-4e39-9ef7-1b2b6936b6d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_22148a5f-d085-48be-84e5-a6e656e33de2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_f11b82de-cb8b-4e39-9ef7-1b2b6936b6d6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_22148a5f-d085-48be-84e5-a6e656e33de2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_22148a5f-d085-48be-84e5-a6e656e33de2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_22148a5f-d085-48be-84e5-a6e656e33de2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_22148a5f-d085-48be-84e5-a6e656e33de2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f2b0b735-b7c8-4b46-9f60-cec0f7bd141e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_22148a5f-d085-48be-84e5-a6e656e33de2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f2b0b735-b7c8-4b46-9f60-cec0f7bd141e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_5948f067-e32b-4110-9fdb-71d90652d1f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f2b0b735-b7c8-4b46-9f60-cec0f7bd141e" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_5948f067-e32b-4110-9fdb-71d90652d1f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_76894723-e794-4795-9a4b-964a34cdffd8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f2b0b735-b7c8-4b46-9f60-cec0f7bd141e" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_76894723-e794-4795-9a4b-964a34cdffd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerEquipmentMember_432fe6e0-a69e-4b5d-a2ed-d9963779d1b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f2b0b735-b7c8-4b46-9f60-cec0f7bd141e" xlink:to="loc_us-gaap_ComputerEquipmentMember_432fe6e0-a69e-4b5d-a2ed-d9963779d1b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FurnitureAndEquipmentMember_3c0f0c06-9a52-4b66-b136-313ccc26b589" xlink:href="afrm-20220630.xsd#afrm_FurnitureAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f2b0b735-b7c8-4b46-9f60-cec0f7bd141e" xlink:to="loc_afrm_FurnitureAndEquipmentMember_3c0f0c06-9a52-4b66-b136-313ccc26b589" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/BalanceSheetComponentsAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#BalanceSheetComponentsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/BalanceSheetComponentsAdditionalInformationDetails" xlink:type="extended" id="id407f428225144f7b3ddbdb5cc5b1639_BalanceSheetComponentsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_ca465b96-80f8-4473-b735-c4aa19916a61" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_Depreciation_ca465b96-80f8-4473-b735-c4aa19916a61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_332abe9b-b339-460b-a8e3-bde06d46143e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_332abe9b-b339-460b-a8e3-bde06d46143e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_7a089729-5c08-43aa-931e-903b100e7cd9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_7a089729-5c08-43aa-931e-903b100e7cd9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_c64d9e44-799f-4d44-8ef8-0e1b42be4071" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_c64d9e44-799f-4d44-8ef8-0e1b42be4071" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_dcc3bb92-8e68-4d28-ab62-aacfde251268" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_dcc3bb92-8e68-4d28-ab62-aacfde251268" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_0bd0572a-510d-48d0-b12f-3a3bad04294c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_0bd0572a-510d-48d0-b12f-3a3bad04294c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_9bc56040-d352-41ca-8366-94b3f0d6e31f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_9bc56040-d352-41ca-8366-94b3f0d6e31f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetGross_e0193673-0b5a-4eac-9f06-787b6d7c21b1" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_afrm_CommercialAgreementAssetGross_e0193673-0b5a-4eac-9f06-787b6d7c21b1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_WarrantsExercisedCommercialAgreementTerm_902dd07e-cf3b-4e9c-ac5c-25f22cb26692" xlink:href="afrm-20220630.xsd#afrm_WarrantsExercisedCommercialAgreementTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_afrm_WarrantsExercisedCommercialAgreementTerm_902dd07e-cf3b-4e9c-ac5c-25f22cb26692" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AmortizationOfSalesAndMarketingExpense_cf6da06b-e8b8-4eb6-aa9d-1195f69c603a" xlink:href="afrm-20220630.xsd#afrm_AmortizationOfSalesAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_afrm_AmortizationOfSalesAndMarketingExpense_cf6da06b-e8b8-4eb6-aa9d-1195f69c603a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetAmortizationPeriod_886c6952-bc1a-43fe-a33c-1256f7c4e0d9" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_afrm_CommercialAgreementAssetAmortizationPeriod_886c6952-bc1a-43fe-a33c-1256f7c4e0d9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetAmortizationPeriodLengthOfExtension_d4ee688f-4836-455e-9738-795ea1612d47" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetAmortizationPeriodLengthOfExtension"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_afrm_CommercialAgreementAssetAmortizationPeriodLengthOfExtension_d4ee688f-4836-455e-9738-795ea1612d47" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AmortizationOfCommercialAgreementAssets_d0479e12-d839-4469-935f-70ee347a7ebc" xlink:href="afrm-20220630.xsd#afrm_AmortizationOfCommercialAgreementAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_afrm_AmortizationOfCommercialAgreementAssets_d0479e12-d839-4469-935f-70ee347a7ebc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_79e64a9a-f9d6-4991-8b03-31c76af476aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_79e64a9a-f9d6-4991-8b03-31c76af476aa" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_56034bc9-075a-4a46-b4b7-4096c34adb00" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41d0c158-07f8-4f29-8900-ce92799edb3b" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_56034bc9-075a-4a46-b4b7-4096c34adb00" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8d4fd825-4351-4915-afec-79e37378fb3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_56034bc9-075a-4a46-b4b7-4096c34adb00" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8d4fd825-4351-4915-afec-79e37378fb3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8d4fd825-4351-4915-afec-79e37378fb3b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8d4fd825-4351-4915-afec-79e37378fb3b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8d4fd825-4351-4915-afec-79e37378fb3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cac53320-451f-4c72-bc51-f7d84ed1fe5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8d4fd825-4351-4915-afec-79e37378fb3b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cac53320-451f-4c72-bc51-f7d84ed1fe5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_7e74f955-c5a5-48ed-a161-71cdff8e2b49" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cac53320-451f-4c72-bc51-f7d84ed1fe5d" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_7e74f955-c5a5-48ed-a161-71cdff8e2b49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetTypeAxis_900a4ac6-37fe-48d2-a3aa-d33b9c7004d3" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_56034bc9-075a-4a46-b4b7-4096c34adb00" xlink:to="loc_afrm_CommercialAgreementAssetTypeAxis_900a4ac6-37fe-48d2-a3aa-d33b9c7004d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetTypeDomain_900a4ac6-37fe-48d2-a3aa-d33b9c7004d3_default" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_afrm_CommercialAgreementAssetTypeAxis_900a4ac6-37fe-48d2-a3aa-d33b9c7004d3" xlink:to="loc_afrm_CommercialAgreementAssetTypeDomain_900a4ac6-37fe-48d2-a3aa-d33b9c7004d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetTypeDomain_f1d703df-0dcb-48d1-804c-dbf6a7ab2dec" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_afrm_CommercialAgreementAssetTypeAxis_900a4ac6-37fe-48d2-a3aa-d33b9c7004d3" xlink:to="loc_afrm_CommercialAgreementAssetTypeDomain_f1d703df-0dcb-48d1-804c-dbf6a7ab2dec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetShopifyIncWarrantsMember_95b47df0-f02b-428d-9f7f-d70ec91f0dd4" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetShopifyIncWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CommercialAgreementAssetTypeDomain_f1d703df-0dcb-48d1-804c-dbf6a7ab2dec" xlink:to="loc_afrm_CommercialAgreementAssetShopifyIncWarrantsMember_95b47df0-f02b-428d-9f7f-d70ec91f0dd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetEnterprisePartnerStockAppreciationRightsMember_a2e31e22-de66-4bf1-aede-3b73b3a45f7c" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetEnterprisePartnerStockAppreciationRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CommercialAgreementAssetTypeDomain_f1d703df-0dcb-48d1-804c-dbf6a7ab2dec" xlink:to="loc_afrm_CommercialAgreementAssetEnterprisePartnerStockAppreciationRightsMember_a2e31e22-de66-4bf1-aede-3b73b3a45f7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_2fd51e62-9d27-4cf8-a888-8f0e70ec3da3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_56034bc9-075a-4a46-b4b7-4096c34adb00" xlink:to="loc_us-gaap_AssetAcquisitionAxis_2fd51e62-9d27-4cf8-a888-8f0e70ec3da3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_2fd51e62-9d27-4cf8-a888-8f0e70ec3da3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_2fd51e62-9d27-4cf8-a888-8f0e70ec3da3" xlink:to="loc_us-gaap_AssetAcquisitionDomain_2fd51e62-9d27-4cf8-a888-8f0e70ec3da3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_3f6a05a0-c3de-4b6f-9727-37f2f26ca64f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_2fd51e62-9d27-4cf8-a888-8f0e70ec3da3" xlink:to="loc_us-gaap_AssetAcquisitionDomain_3f6a05a0-c3de-4b6f-9727-37f2f26ca64f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FastAFIncMember_988ff533-8291-4915-b7d4-8484a355aabe" xlink:href="afrm-20220630.xsd#afrm_FastAFIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_3f6a05a0-c3de-4b6f-9727-37f2f26ca64f" xlink:to="loc_afrm_FastAFIncMember_988ff533-8291-4915-b7d4-8484a355aabe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_21eef4c0-4c24-47a0-8b7b-512cfb54bcc6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_56034bc9-075a-4a46-b4b7-4096c34adb00" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_21eef4c0-4c24-47a0-8b7b-512cfb54bcc6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_21eef4c0-4c24-47a0-8b7b-512cfb54bcc6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_21eef4c0-4c24-47a0-8b7b-512cfb54bcc6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_21eef4c0-4c24-47a0-8b7b-512cfb54bcc6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9327359b-d722-491e-9f01-eae64200ec76" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_21eef4c0-4c24-47a0-8b7b-512cfb54bcc6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9327359b-d722-491e-9f01-eae64200ec76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_8e12f99c-4464-4876-ae85-c10d8b6668fd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9327359b-d722-491e-9f01-eae64200ec76" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_8e12f99c-4464-4876-ae85-c10d8b6668fd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/BalanceSheetComponentsIntangibleAssetsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#BalanceSheetComponentsIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/BalanceSheetComponentsIntangibleAssetsDetails" xlink:type="extended" id="i26a0ae8989624fd99dc47eb010956ae8_BalanceSheetComponentsIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_faf1f95b-8ca1-48c3-bc03-e9f2d481075e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_faf1f95b-8ca1-48c3-bc03-e9f2d481075e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_aeb43549-2d93-4413-a821-4df81738d158" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_aeb43549-2d93-4413-a821-4df81738d158" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f9733d3d-9fdd-461c-9d10-03806c96d7bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f9733d3d-9fdd-461c-9d10-03806c96d7bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_c6f42382-919d-4a8b-8a3a-8c41796b1f4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_c6f42382-919d-4a8b-8a3a-8c41796b1f4b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_63b8e472-b176-4672-84dc-3933e316fd60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_63b8e472-b176-4672-84dc-3933e316fd60" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_3d0e2c1d-05b1-4145-b007-d1c4ea6fc64b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_3d0e2c1d-05b1-4145-b007-d1c4ea6fc64b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_IntangibleAssetsNetExcludingGoodwillAndNotYetPlacedIntoService_aea1da3c-f080-4a5e-8323-8fbcc4646d71" xlink:href="afrm-20220630.xsd#afrm_IntangibleAssetsNetExcludingGoodwillAndNotYetPlacedIntoService"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_afrm_IntangibleAssetsNetExcludingGoodwillAndNotYetPlacedIntoService_aea1da3c-f080-4a5e-8323-8fbcc4646d71" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7a405464-7eec-475d-92e0-777dc7cc412e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_41478dec-4063-4ea4-81cc-ec8a040d0e57" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7a405464-7eec-475d-92e0-777dc7cc412e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0cc9dee6-043e-4a3c-8a83-ea7a5d40048a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7a405464-7eec-475d-92e0-777dc7cc412e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0cc9dee6-043e-4a3c-8a83-ea7a5d40048a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0cc9dee6-043e-4a3c-8a83-ea7a5d40048a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0cc9dee6-043e-4a3c-8a83-ea7a5d40048a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0cc9dee6-043e-4a3c-8a83-ea7a5d40048a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6b8bed29-55ee-4bb3-9c1d-73220b9ad93f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0cc9dee6-043e-4a3c-8a83-ea7a5d40048a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6b8bed29-55ee-4bb3-9c1d-73220b9ad93f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MerchantRelationshipsMember_583154e6-77f6-4746-a238-aaf1bf4a0ece" xlink:href="afrm-20220630.xsd#afrm_MerchantRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6b8bed29-55ee-4bb3-9c1d-73220b9ad93f" xlink:to="loc_afrm_MerchantRelationshipsMember_583154e6-77f6-4746-a238-aaf1bf4a0ece" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_87d12960-0350-4ffe-8b4d-8898ab097694" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6b8bed29-55ee-4bb3-9c1d-73220b9ad93f" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_87d12960-0350-4ffe-8b4d-8898ab097694" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AssembledWorkforceMember_3f8293bc-e445-43fe-b5aa-77fd6f835b46" xlink:href="afrm-20220630.xsd#afrm_AssembledWorkforceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6b8bed29-55ee-4bb3-9c1d-73220b9ad93f" xlink:to="loc_afrm_AssembledWorkforceMember_3f8293bc-e445-43fe-b5aa-77fd6f835b46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TrademarksAndDomainsMember_3f4d8c37-2be0-473c-91d5-6400c5ccf087" xlink:href="afrm-20220630.xsd#afrm_TrademarksAndDomainsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6b8bed29-55ee-4bb3-9c1d-73220b9ad93f" xlink:to="loc_afrm_TrademarksAndDomainsMember_3f4d8c37-2be0-473c-91d5-6400c5ccf087" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_e581dc4e-2754-4a97-8572-edc9288a6861" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_7a405464-7eec-475d-92e0-777dc7cc412e" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_e581dc4e-2754-4a97-8572-edc9288a6861" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_e581dc4e-2754-4a97-8572-edc9288a6861_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_e581dc4e-2754-4a97-8572-edc9288a6861" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_e581dc4e-2754-4a97-8572-edc9288a6861_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_00883108-9add-44fb-b110-34cbae5ec54e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_e581dc4e-2754-4a97-8572-edc9288a6861" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_00883108-9add-44fb-b110-34cbae5ec54e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TrademarksAndDomainsMember_a39018f1-a3d4-46c3-9862-b27300fd71e7" xlink:href="afrm-20220630.xsd#afrm_TrademarksAndDomainsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_00883108-9add-44fb-b110-34cbae5ec54e" xlink:to="loc_afrm_TrademarksAndDomainsMember_a39018f1-a3d4-46c3-9862-b27300fd71e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_a03a50d0-c30f-4574-942f-566074e182a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_00883108-9add-44fb-b110-34cbae5ec54e" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_a03a50d0-c30f-4574-942f-566074e182a2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/LeasesAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#LeasesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/LeasesAdditionalInformationDetails" xlink:type="extended" id="i5ce96bb429364ed0867b9d3930f32be0_LeasesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_LesseeOperatingLeaseTerminationNoticePeriod_4c33927d-9f71-4b04-901b-203cd787151a" xlink:href="afrm-20220630.xsd#afrm_LesseeOperatingLeaseTerminationNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_afrm_LesseeOperatingLeaseTerminationNoticePeriod_4c33927d-9f71-4b04-901b-203cd787151a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_e1cdb9a9-6d3a-455b-91fe-1db28d2f2f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_e1cdb9a9-6d3a-455b-91fe-1db28d2f2f7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_12b181ca-28bf-428e-8971-b896acc38e16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_RestrictedCash_12b181ca-28bf-428e-8971-b896acc38e16" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_36efd827-f813-4f98-9834-b45ad498dea5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_36efd827-f813-4f98-9834-b45ad498dea5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_12093740-8f0f-48db-82a4-ee55b7908a02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_OperatingLeaseLiability_12093740-8f0f-48db-82a4-ee55b7908a02" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseImpairmentLoss_e984478c-a796-4eba-b04d-513c698500d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_OperatingLeaseImpairmentLoss_e984478c-a796-4eba-b04d-513c698500d5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubleaseIncome_1e6ea91a-c694-48df-ae20-5121f0f0aea5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubleaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_SubleaseIncome_1e6ea91a-c694-48df-ae20-5121f0f0aea5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_1eba63ec-63b4-43e9-9fdf-21723bf96fdc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_803eddbe-8b82-4ab4-8721-10ceca902fae" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_1eba63ec-63b4-43e9-9fdf-21723bf96fdc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_2a95dd39-7d12-4dcb-a77f-dd8097b6a7b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_1eba63ec-63b4-43e9-9fdf-21723bf96fdc" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_2a95dd39-7d12-4dcb-a77f-dd8097b6a7b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_2a95dd39-7d12-4dcb-a77f-dd8097b6a7b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_2a95dd39-7d12-4dcb-a77f-dd8097b6a7b0" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_2a95dd39-7d12-4dcb-a77f-dd8097b6a7b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_b933b419-b7ee-40ac-980d-59631fd11ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_2a95dd39-7d12-4dcb-a77f-dd8097b6a7b0" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_b933b419-b7ee-40ac-980d-59631fd11ff3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CashCollateralAndDepositsForLettersOfCreditMember_9581fba4-0a31-4e4f-82e2-7eda0b974351" xlink:href="afrm-20220630.xsd#afrm_CashCollateralAndDepositsForLettersOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_b933b419-b7ee-40ac-980d-59631fd11ff3" xlink:to="loc_afrm_CashCollateralAndDepositsForLettersOfCreditMember_9581fba4-0a31-4e4f-82e2-7eda0b974351" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_da772423-9379-434b-b5a8-236de9a500ff" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_1eba63ec-63b4-43e9-9fdf-21723bf96fdc" xlink:to="loc_srt_RangeAxis_da772423-9379-434b-b5a8-236de9a500ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_da772423-9379-434b-b5a8-236de9a500ff_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_da772423-9379-434b-b5a8-236de9a500ff" xlink:to="loc_srt_RangeMember_da772423-9379-434b-b5a8-236de9a500ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_64055446-2b38-486d-ad62-a4de33c6de73" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_da772423-9379-434b-b5a8-236de9a500ff" xlink:to="loc_srt_RangeMember_64055446-2b38-486d-ad62-a4de33c6de73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_85deabe6-9412-43ac-b4b2-b1ba84f634e7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_64055446-2b38-486d-ad62-a4de33c6de73" xlink:to="loc_srt_MinimumMember_85deabe6-9412-43ac-b4b2-b1ba84f634e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a81cf114-09e5-4a0d-8473-b57772294c09" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_64055446-2b38-486d-ad62-a4de33c6de73" xlink:to="loc_srt_MaximumMember_a81cf114-09e5-4a0d-8473-b57772294c09" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/CommitmentandContingenciesAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#CommitmentandContingenciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/CommitmentandContingenciesAdditionalInformationDetails" xlink:type="extended" id="i3b3944459b1449f499d5358b1005d0c7_CommitmentandContingenciesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_3aaf9d96-33e9-4c7b-bd8a-c4083f97b201" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_3aaf9d96-33e9-4c7b-bd8a-c4083f97b201" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability_656fa2d4-a213-4f35-a00a-3c6bb4829baa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability_656fa2d4-a213-4f35-a00a-3c6bb4829baa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_f1510742-decf-4efe-8f23-3bee18b67025" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_f1510742-decf-4efe-8f23-3bee18b67025" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentAmount_e81dbaf5-1b0e-4e87-944c-277a1f7557ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermPurchaseCommitmentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentAmount_e81dbaf5-1b0e-4e87-944c-277a1f7557ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_46a2e8f5-5e83-43b4-b135-75dbee19ece8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_46a2e8f5-5e83-43b4-b135-75dbee19ece8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_LongTermPurchaseCommitmentTerminationAgreementNoticePeriod_c6b5f199-f088-4276-8354-4a1cb3a025eb" xlink:href="afrm-20220630.xsd#afrm_LongTermPurchaseCommitmentTerminationAgreementNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_afrm_LongTermPurchaseCommitmentTerminationAgreementNoticePeriod_c6b5f199-f088-4276-8354-4a1cb3a025eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_978b3b72-347e-4381-91b2-fc35b880867b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_5a8e7931-8391-49ee-ab2e-414d11d8ab0e" xlink:to="loc_us-gaap_OtherCommitmentsTable_978b3b72-347e-4381-91b2-fc35b880867b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_716887b6-12e6-489b-9378-036f30bd8e23" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_978b3b72-347e-4381-91b2-fc35b880867b" xlink:to="loc_srt_StatementGeographicalAxis_716887b6-12e6-489b-9378-036f30bd8e23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_716887b6-12e6-489b-9378-036f30bd8e23_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_716887b6-12e6-489b-9378-036f30bd8e23" xlink:to="loc_srt_SegmentGeographicalDomain_716887b6-12e6-489b-9378-036f30bd8e23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_04fc3753-73ce-4964-83ce-f5388f9e0414" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_716887b6-12e6-489b-9378-036f30bd8e23" xlink:to="loc_srt_SegmentGeographicalDomain_04fc3753-73ce-4964-83ce-f5388f9e0414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_CA_6c4a1c3f-4d52-4017-aa1d-34a576fbac4d" xlink:href="https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd#stpr_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_04fc3753-73ce-4964-83ce-f5388f9e0414" xlink:to="loc_stpr_CA_6c4a1c3f-4d52-4017-aa1d-34a576fbac4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_4a38e475-cdd9-422f-8e76-e5b7f517f760" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_978b3b72-347e-4381-91b2-fc35b880867b" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_4a38e475-cdd9-422f-8e76-e5b7f517f760" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_4a38e475-cdd9-422f-8e76-e5b7f517f760_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_4a38e475-cdd9-422f-8e76-e5b7f517f760" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_4a38e475-cdd9-422f-8e76-e5b7f517f760_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_2ec4851e-f18e-43ff-abb3-ffb830a2ea30" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_4a38e475-cdd9-422f-8e76-e5b7f517f760" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_2ec4851e-f18e-43ff-abb3-ffb830a2ea30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_00fcca23-fa80-43d7-8081-7b635ae20378" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_2ec4851e-f18e-43ff-abb3-ffb830a2ea30" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_00fcca23-fa80-43d7-8081-7b635ae20378" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_b6719305-85b5-4eed-8732-a10934444a52" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_2ec4851e-f18e-43ff-abb3-ffb830a2ea30" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_b6719305-85b5-4eed-8732-a10934444a52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_f37ba89e-bbb7-4e10-8604-7b9b81a11724" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_978b3b72-347e-4381-91b2-fc35b880867b" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_f37ba89e-bbb7-4e10-8604-7b9b81a11724" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f37ba89e-bbb7-4e10-8604-7b9b81a11724_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_f37ba89e-bbb7-4e10-8604-7b9b81a11724" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f37ba89e-bbb7-4e10-8604-7b9b81a11724_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_69333d2b-5fb9-4d3e-b368-c80d88090cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_f37ba89e-bbb7-4e10-8604-7b9b81a11724" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_69333d2b-5fb9-4d3e-b368-c80d88090cb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceReceivablesMember_c8b0c959-2847-4f87-9377-874248f199b1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_69333d2b-5fb9-4d3e-b368-c80d88090cb4" xlink:to="loc_us-gaap_FinanceReceivablesMember_c8b0c959-2847-4f87-9377-874248f199b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_352a2b06-e60b-480a-9063-6cfd33c34140" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_69333d2b-5fb9-4d3e-b368-c80d88090cb4" xlink:to="loc_us-gaap_SalesRevenueNetMember_352a2b06-e60b-480a-9063-6cfd33c34140" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_7583e4a5-f10f-4a67-a05d-6bdf7992297e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_978b3b72-347e-4381-91b2-fc35b880867b" xlink:to="loc_srt_MajorCustomersAxis_7583e4a5-f10f-4a67-a05d-6bdf7992297e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_7583e4a5-f10f-4a67-a05d-6bdf7992297e_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_7583e4a5-f10f-4a67-a05d-6bdf7992297e" xlink:to="loc_srt_NameOfMajorCustomerDomain_7583e4a5-f10f-4a67-a05d-6bdf7992297e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_e9cd43cf-fe7b-4d77-bd13-5e2acb2d5610" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_7583e4a5-f10f-4a67-a05d-6bdf7992297e" xlink:to="loc_srt_NameOfMajorCustomerDomain_e9cd43cf-fe7b-4d77-bd13-5e2acb2d5610" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_LargestMerchantPartnerMember_53b6e324-5243-465a-b073-830ee4ba3e71" xlink:href="afrm-20220630.xsd#afrm_LargestMerchantPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_e9cd43cf-fe7b-4d77-bd13-5e2acb2d5610" xlink:to="loc_afrm_LargestMerchantPartnerMember_53b6e324-5243-465a-b073-830ee4ba3e71" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/DebtAggregateFutureMaturitiesofFundingDebtDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#DebtAggregateFutureMaturitiesofFundingDebtDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/DebtAggregateFutureMaturitiesofFundingDebtDetails" xlink:type="extended" id="ie28d62d37dac4df38811a1ef5cef4e8b_DebtAggregateFutureMaturitiesofFundingDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_c510b1f9-66a8-485f-8831-474602ad106c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_c510b1f9-66a8-485f-8831-474602ad106c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_46f68fb1-7eaa-4910-90c9-127f6d204ed0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_46f68fb1-7eaa-4910-90c9-127f6d204ed0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_b8b73223-2924-466a-bdc3-e158450f8d0d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_b8b73223-2924-466a-bdc3-e158450f8d0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_11545050-8321-49e8-b702-241696be5149" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_11545050-8321-49e8-b702-241696be5149" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_d0c3dc9c-c642-4ac7-86ea-96a9c588abab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_d0c3dc9c-c642-4ac7-86ea-96a9c588abab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_bddd311a-37e2-4c08-a4af-ceb6768f9198" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_bddd311a-37e2-4c08-a4af-ceb6768f9198" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_6557c463-7891-4be1-ba02-d419b728ed21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_6557c463-7891-4be1-ba02-d419b728ed21" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_55f0417b-2028-4fd5-898d-d1038ac85b00" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_55f0417b-2028-4fd5-898d-d1038ac85b00" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_c82043e5-5688-438e-85bb-bbe5e4d0ac31" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LongTermDebt_c82043e5-5688-438e-85bb-bbe5e4d0ac31" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_91da04cf-f15d-40b7-a67d-a6884042e5fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_51a83fb1-8fb1-4dc1-90a9-d18afe75d4fa" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_91da04cf-f15d-40b7-a67d-a6884042e5fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_b2ecfd9d-b5d1-4370-87ac-76cd668c481a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_91da04cf-f15d-40b7-a67d-a6884042e5fc" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_b2ecfd9d-b5d1-4370-87ac-76cd668c481a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_b2ecfd9d-b5d1-4370-87ac-76cd668c481a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_b2ecfd9d-b5d1-4370-87ac-76cd668c481a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_b2ecfd9d-b5d1-4370-87ac-76cd668c481a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_b604f365-7752-41ab-8bcd-295e471b0ded" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_b2ecfd9d-b5d1-4370-87ac-76cd668c481a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_b604f365-7752-41ab-8bcd-295e471b0ded" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_e72dc58c-4f25-40e6-91fc-f5720960272c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_b604f365-7752-41ab-8bcd-295e471b0ded" xlink:to="loc_us-gaap_LineOfCreditMember_e72dc58c-4f25-40e6-91fc-f5720960272c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_2420d850-f129-42cf-8316-6c6c01f4c37a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_91da04cf-f15d-40b7-a67d-a6884042e5fc" xlink:to="loc_us-gaap_CreditFacilityAxis_2420d850-f129-42cf-8316-6c6c01f4c37a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_2420d850-f129-42cf-8316-6c6c01f4c37a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_2420d850-f129-42cf-8316-6c6c01f4c37a" xlink:to="loc_us-gaap_CreditFacilityDomain_2420d850-f129-42cf-8316-6c6c01f4c37a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_66c5dca2-2c1e-4fe6-a4f1-965cbeb3f46c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_2420d850-f129-42cf-8316-6c6c01f4c37a" xlink:to="loc_us-gaap_CreditFacilityDomain_66c5dca2-2c1e-4fe6-a4f1-965cbeb3f46c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_28a40eac-6e77-4c1b-8d7f-a4a6e2675c04" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_66c5dca2-2c1e-4fe6-a4f1-965cbeb3f46c" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_28a40eac-6e77-4c1b-8d7f-a4a6e2675c04" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/DebtAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#DebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/DebtAdditionalInformationDetails" xlink:type="extended" id="i62bf6529c993477399ef77a44dd35bb8_DebtAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentAdvanceRatePercentage_a5212609-6bbd-40c2-a165-315ded22952a" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentAdvanceRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_afrm_DebtInstrumentAdvanceRatePercentage_a5212609-6bbd-40c2-a165-315ded22952a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentCovenantPeriodPriorToFinalMaturityDateBorrowingsCanOccur_b46a4591-6fc9-46b6-aa11-a6490c411333" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentCovenantPeriodPriorToFinalMaturityDateBorrowingsCanOccur"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_afrm_DebtInstrumentCovenantPeriodPriorToFinalMaturityDateBorrowingsCanOccur_b46a4591-6fc9-46b6-aa11-a6490c411333" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_05c3c59f-e650-44e6-8ebe-9c667b0ee23f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_05c3c59f-e650-44e6-8ebe-9c667b0ee23f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_324b4397-66e2-45ba-8f5d-5550ee314e40" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_324b4397-66e2-45ba-8f5d-5550ee314e40" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_e7ee89f7-15ad-48c0-b278-f65fd24a9429" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_e7ee89f7-15ad-48c0-b278-f65fd24a9429" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_8879ca13-cc8f-451b-8a0c-fc0d4abbcdc1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_8879ca13-cc8f-451b-8a0c-fc0d4abbcdc1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5a15b343-b53e-487b-8334-6eb4e2f70d86" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5a15b343-b53e-487b-8334-6eb4e2f70d86" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_2bc09ae0-3b7b-4250-ad71-6dfaee401699" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_2bc09ae0-3b7b-4250-ad71-6dfaee401699" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentInterestRate_ccdacb23-5a38-4d40-bd67-a2fa7156e63a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_InvestmentInterestRate_ccdacb23-5a38-4d40-bd67-a2fa7156e63a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_f9a57918-44c4-4b11-b12d-decd0d763569" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_LongTermDebt_f9a57918-44c4-4b11-b12d-decd0d763569" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_a254bbff-b588-43ec-87b4-da9abdc2b352" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_a254bbff-b588-43ec-87b4-da9abdc2b352" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_54d3f3e6-a751-42ab-91ba-9d76dbe07c36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_54d3f3e6-a751-42ab-91ba-9d76dbe07c36" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_53ed840b-2700-42b3-a6b5-48251ecc9093" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromDebtNetOfIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_53ed840b-2700-42b3-a6b5-48251ecc9093" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_d29d91f2-f29c-47ae-9377-caf1e8e56c1c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_d29d91f2-f29c-47ae-9377-caf1e8e56c1c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_1478d4b3-9751-4ca5-8027-a35a03b6f052" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_1478d4b3-9751-4ca5-8027-a35a03b6f052" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_b2eb260f-e2e4-4b99-8a0a-116ef80705d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_b2eb260f-e2e4-4b99-8a0a-116ef80705d5" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_eeff4aa6-7a40-4551-82c4-f8057b79ee6b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_eeff4aa6-7a40-4551-82c4-f8057b79ee6b" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_12a1e387-ce76-4242-9af2-268396c5f58b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_12a1e387-ce76-4242-9af2-268396c5f58b" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MinimumPercentageOfTradingPriceToLastReportedSalePrice_cccda606-de8c-4ffb-9884-db5ae69e1ec1" xlink:href="afrm-20220630.xsd#afrm_MinimumPercentageOfTradingPriceToLastReportedSalePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_afrm_MinimumPercentageOfTradingPriceToLastReportedSalePrice_cccda606-de8c-4ffb-9884-db5ae69e1ec1" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_ac915620-3d55-4e67-964c-42b38b98bb42" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_InterestExpense_ac915620-3d55-4e67-964c-42b38b98bb42" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentRemainingLife_81f4752b-a961-401d-bc06-d7c7afc5274c" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentRemainingLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_afrm_DebtInstrumentRemainingLife_81f4752b-a961-401d-bc06-d7c7afc5274c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_1c1408df-1144-4d96-88e9-089bc70f7b66" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_1c1408df-1144-4d96-88e9-089bc70f7b66" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_c587e1d9-fb5c-471c-9449-0b32a072bc35" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_LineOfCredit_c587e1d9-fb5c-471c-9449-0b32a072bc35" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e2d9a25d-a367-4c42-9cf3-de2632c0042a" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_e3440585-c3dc-4035-9239-d42a0fb08d67" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_srt_RangeAxis_e3440585-c3dc-4035-9239-d42a0fb08d67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e3440585-c3dc-4035-9239-d42a0fb08d67_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_e3440585-c3dc-4035-9239-d42a0fb08d67" xlink:to="loc_srt_RangeMember_e3440585-c3dc-4035-9239-d42a0fb08d67_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_04a023ca-d638-44d5-bfec-e64026dc7918" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_e3440585-c3dc-4035-9239-d42a0fb08d67" xlink:to="loc_srt_RangeMember_04a023ca-d638-44d5-bfec-e64026dc7918" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_365bed61-26b3-475e-a2c6-e77fa55d1f17" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_04a023ca-d638-44d5-bfec-e64026dc7918" xlink:to="loc_srt_MinimumMember_365bed61-26b3-475e-a2c6-e77fa55d1f17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_17f2c0d5-8021-4091-8d04-544f4908e88e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_04a023ca-d638-44d5-bfec-e64026dc7918" xlink:to="loc_srt_MaximumMember_17f2c0d5-8021-4091-8d04-544f4908e88e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_31508f2b-11ca-46ff-8ab6-36915c924b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_CreditFacilityAxis_31508f2b-11ca-46ff-8ab6-36915c924b8c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_31508f2b-11ca-46ff-8ab6-36915c924b8c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_31508f2b-11ca-46ff-8ab6-36915c924b8c" xlink:to="loc_us-gaap_CreditFacilityDomain_31508f2b-11ca-46ff-8ab6-36915c924b8c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_3c4771fb-d390-473f-bd94-d93e08fb0470" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_31508f2b-11ca-46ff-8ab6-36915c924b8c" xlink:to="loc_us-gaap_CreditFacilityDomain_3c4771fb-d390-473f-bd94-d93e08fb0470" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_82dfcc92-632e-4c6b-b60e-23ae0e95a556" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3c4771fb-d390-473f-bd94-d93e08fb0470" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_82dfcc92-632e-4c6b-b60e-23ae0e95a556" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_cbae5239-756e-45ba-9a02-905ff4328fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_DebtInstrumentAxis_cbae5239-756e-45ba-9a02-905ff4328fd3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_cbae5239-756e-45ba-9a02-905ff4328fd3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_cbae5239-756e-45ba-9a02-905ff4328fd3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_cbae5239-756e-45ba-9a02-905ff4328fd3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_cbae5239-756e-45ba-9a02-905ff4328fd3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_WarehouseCreditFacilitiesMember_775fe497-3211-401b-a2e6-e3335b4924fa" xlink:href="afrm-20220630.xsd#afrm_WarehouseCreditFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_WarehouseCreditFacilitiesMember_775fe497-3211-401b-a2e6-e3335b4924fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PayBrightFundingFacilitiesMember_9ce328bb-0978-4c48-ab4d-289c6101c9e7" xlink:href="afrm-20220630.xsd#afrm_PayBrightFundingFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_PayBrightFundingFacilitiesMember_9ce328bb-0978-4c48-ab4d-289c6101c9e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022X1NotesMember_5cbb8696-5613-459f-ac5d-37b1b39df35c" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022X1NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022X1NotesMember_5cbb8696-5613-459f-ac5d-37b1b39df35c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z1NotesMember_8b479394-ffd3-4b49-8128-b2a1e93a0f3c" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z1NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z1NotesMember_8b479394-ffd3-4b49-8128-b2a1e93a0f3c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z2NotesMember_4655a5cf-6edc-430d-8dea-afe6f5ed7ead" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z2NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z2NotesMember_4655a5cf-6edc-430d-8dea-afe6f5ed7ead" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z1And2021Z2NotesMember_7b58ccef-3ebc-41d2-aad5-adc287662b0a" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z1And2021Z2NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z1And2021Z2NotesMember_7b58ccef-3ebc-41d2-aad5-adc287662b0a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ConvertibleSeniorNotesMember_7e0bf896-8082-4efe-8b6c-e40185b61d9d" xlink:href="afrm-20220630.xsd#afrm_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b77ad3a2-fd01-4401-a74f-4af77983e3e4" xlink:to="loc_afrm_ConvertibleSeniorNotesMember_7e0bf896-8082-4efe-8b6c-e40185b61d9d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_a7b91339-23ab-4b76-9428-27f3d4bd132a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_a7b91339-23ab-4b76-9428-27f3d4bd132a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a7b91339-23ab-4b76-9428-27f3d4bd132a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_a7b91339-23ab-4b76-9428-27f3d4bd132a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a7b91339-23ab-4b76-9428-27f3d4bd132a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_125e39be-77e0-4c86-87f1-f439cf613691" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_a7b91339-23ab-4b76-9428-27f3d4bd132a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_125e39be-77e0-4c86-87f1-f439cf613691" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_57b904c2-1418-4b63-9878-7f7589635b25" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_125e39be-77e0-4c86-87f1-f439cf613691" xlink:to="loc_us-gaap_LineOfCreditMember_57b904c2-1418-4b63-9878-7f7589635b25" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_RepurchaseAgreementMember_853295a9-4075-48af-83c8-87d28587867c" xlink:href="afrm-20220630.xsd#afrm_RepurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_125e39be-77e0-4c86-87f1-f439cf613691" xlink:to="loc_afrm_RepurchaseAgreementMember_853295a9-4075-48af-83c8-87d28587867c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_3d0045a3-907c-4755-93c7-0615e1b54e9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_125e39be-77e0-4c86-87f1-f439cf613691" xlink:to="loc_us-gaap_ConvertibleDebtMember_3d0045a3-907c-4755-93c7-0615e1b54e9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis_f7438e33-a013-4110-ac7b-c62b953c6990" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_PledgedStatusAxis_f7438e33-a013-4110-ac7b-c62b953c6990" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_f7438e33-a013-4110-ac7b-c62b953c6990_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PledgedStatusAxis_f7438e33-a013-4110-ac7b-c62b953c6990" xlink:to="loc_us-gaap_PledgedStatusDomain_f7438e33-a013-4110-ac7b-c62b953c6990_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_a80a4119-698b-40f5-a80d-58e72d3826b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PledgedStatusAxis_f7438e33-a013-4110-ac7b-c62b953c6990" xlink:to="loc_us-gaap_PledgedStatusDomain_a80a4119-698b-40f5-a80d-58e72d3826b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember_009c483a-4b94-4a08-b7c9-d2fe8abf63f1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PledgedStatusDomain_a80a4119-698b-40f5-a80d-58e72d3826b8" xlink:to="loc_us-gaap_AssetPledgedAsCollateralMember_009c483a-4b94-4a08-b7c9-d2fe8abf63f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_956dca26-0844-46d2-9f98-549b415e68b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_VariableRateAxis_956dca26-0844-46d2-9f98-549b415e68b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_956dca26-0844-46d2-9f98-549b415e68b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_956dca26-0844-46d2-9f98-549b415e68b2" xlink:to="loc_us-gaap_VariableRateDomain_956dca26-0844-46d2-9f98-549b415e68b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_409a4a3c-3cd8-4385-a5e3-011254b912bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_956dca26-0844-46d2-9f98-549b415e68b2" xlink:to="loc_us-gaap_VariableRateDomain_409a4a3c-3cd8-4385-a5e3-011254b912bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_d8c4cd96-b45e-4722-a705-41f5738b3199" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_409a4a3c-3cd8-4385-a5e3-011254b912bd" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_d8c4cd96-b45e-4722-a705-41f5738b3199" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialPaperRateMember_e4b396af-a7cb-4567-8f15-c1239dfedbc1" xlink:href="afrm-20220630.xsd#afrm_CommercialPaperRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_409a4a3c-3cd8-4385-a5e3-011254b912bd" xlink:to="loc_afrm_CommercialPaperRateMember_e4b396af-a7cb-4567-8f15-c1239dfedbc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_4297085f-0ddf-4ac0-9365-2bb4c40b14b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_InvestmentTypeAxis_4297085f-0ddf-4ac0-9365-2bb4c40b14b7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_4297085f-0ddf-4ac0-9365-2bb4c40b14b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_4297085f-0ddf-4ac0-9365-2bb4c40b14b7" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_4297085f-0ddf-4ac0-9365-2bb4c40b14b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_519b1189-15e1-45e8-9d2b-844772bf2ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_4297085f-0ddf-4ac0-9365-2bb4c40b14b7" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_519b1189-15e1-45e8-9d2b-844772bf2ee1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SeniorPledgedSecuritiesMember_568a8194-9275-4dad-abdd-3fe5d08c0be7" xlink:href="afrm-20220630.xsd#afrm_SeniorPledgedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_519b1189-15e1-45e8-9d2b-844772bf2ee1" xlink:to="loc_afrm_SeniorPledgedSecuritiesMember_568a8194-9275-4dad-abdd-3fe5d08c0be7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualCertificatePledgedSecuritiesMember_4f14a38e-f682-4e99-8ea0-4dacf69ecdb7" xlink:href="afrm-20220630.xsd#afrm_ResidualCertificatePledgedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_519b1189-15e1-45e8-9d2b-844772bf2ee1" xlink:to="loc_afrm_ResidualCertificatePledgedSecuritiesMember_4f14a38e-f682-4e99-8ea0-4dacf69ecdb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_2c5d5272-ed0d-41e0-bc52-c04946a2fbac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_2c5d5272-ed0d-41e0-bc52-c04946a2fbac" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_2c5d5272-ed0d-41e0-bc52-c04946a2fbac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_2c5d5272-ed0d-41e0-bc52-c04946a2fbac" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_2c5d5272-ed0d-41e0-bc52-c04946a2fbac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_0deb442b-8b34-45a0-9f9d-42a044e9e458" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_2c5d5272-ed0d-41e0-bc52-c04946a2fbac" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_0deb442b-8b34-45a0-9f9d-42a044e9e458" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_OtherReceivablesMember_090cc451-b385-4995-9c60-ab76731a1078" xlink:href="afrm-20220630.xsd#afrm_OtherReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_0deb442b-8b34-45a0-9f9d-42a044e9e458" xlink:to="loc_afrm_OtherReceivablesMember_090cc451-b385-4995-9c60-ab76731a1078" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentConversionAxis_fbd58fcb-115e-4d74-b7f7-31fef21262ad" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentConversionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_afrm_DebtInstrumentConversionAxis_fbd58fcb-115e-4d74-b7f7-31fef21262ad" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentConversionDomain_fbd58fcb-115e-4d74-b7f7-31fef21262ad_default" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentConversionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_afrm_DebtInstrumentConversionAxis_fbd58fcb-115e-4d74-b7f7-31fef21262ad" xlink:to="loc_afrm_DebtInstrumentConversionDomain_fbd58fcb-115e-4d74-b7f7-31fef21262ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentConversionDomain_86ada891-d2b1-40bd-945e-79bce5d459dc" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentConversionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_afrm_DebtInstrumentConversionAxis_fbd58fcb-115e-4d74-b7f7-31fef21262ad" xlink:to="loc_afrm_DebtInstrumentConversionDomain_86ada891-d2b1-40bd-945e-79bce5d459dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ConversionPeriodOneMember_6869278c-a805-4074-8161-c8ae856bbdd8" xlink:href="afrm-20220630.xsd#afrm_ConversionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_DebtInstrumentConversionDomain_86ada891-d2b1-40bd-945e-79bce5d459dc" xlink:to="loc_afrm_ConversionPeriodOneMember_6869278c-a805-4074-8161-c8ae856bbdd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ConversionPeriodTwoMember_86d00254-42bc-4345-9086-790ffa4a72a7" xlink:href="afrm-20220630.xsd#afrm_ConversionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_DebtInstrumentConversionDomain_86ada891-d2b1-40bd-945e-79bce5d459dc" xlink:to="loc_afrm_ConversionPeriodTwoMember_86d00254-42bc-4345-9086-790ffa4a72a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_VariableRateComponentAxis_13846159-c62d-4a82-86db-c79bf4e40a24" xlink:href="afrm-20220630.xsd#afrm_VariableRateComponentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_eb989a29-c1c2-4b5b-8419-f53c155b98bf" xlink:to="loc_afrm_VariableRateComponentAxis_13846159-c62d-4a82-86db-c79bf4e40a24" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_VariableRateComponentDomain_13846159-c62d-4a82-86db-c79bf4e40a24_default" xlink:href="afrm-20220630.xsd#afrm_VariableRateComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_afrm_VariableRateComponentAxis_13846159-c62d-4a82-86db-c79bf4e40a24" xlink:to="loc_afrm_VariableRateComponentDomain_13846159-c62d-4a82-86db-c79bf4e40a24_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_VariableRateComponentDomain_f278dc70-3338-4708-8684-eee073bf4443" xlink:href="afrm-20220630.xsd#afrm_VariableRateComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_afrm_VariableRateComponentAxis_13846159-c62d-4a82-86db-c79bf4e40a24" xlink:to="loc_afrm_VariableRateComponentDomain_f278dc70-3338-4708-8684-eee073bf4443" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_57fafc42-06c3-4fcd-9b93-44ceb9bb1680" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FederalFundsEffectiveSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_VariableRateComponentDomain_f278dc70-3338-4708-8684-eee073bf4443" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_57fafc42-06c3-4fcd-9b93-44ceb9bb1680" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_OneMonthLondonInterbankOfferedRateLIBORMember_83f67041-dce1-4be0-b4c4-be08924c5410" xlink:href="afrm-20220630.xsd#afrm_OneMonthLondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_VariableRateComponentDomain_f278dc70-3338-4708-8684-eee073bf4443" xlink:to="loc_afrm_OneMonthLondonInterbankOfferedRateLIBORMember_83f67041-dce1-4be0-b4c4-be08924c5410" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_76a2a147-b8c8-440a-90f1-5c2315119f60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_VariableRateComponentDomain_f278dc70-3338-4708-8684-eee073bf4443" xlink:to="loc_us-gaap_BaseRateMember_76a2a147-b8c8-440a-90f1-5c2315119f60" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/DebtConvertibleNotesOutstandingDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#DebtConvertibleNotesOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/DebtConvertibleNotesOutstandingDetails" xlink:type="extended" id="i48e40342c9ca4340962b1f0be9b0b000_DebtConvertibleNotesOutstandingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_54746919-dd02-45f9-b862-86edcac3a47b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_6372065c-7b4b-4c87-91a1-b3a04dfa0dc5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_54746919-dd02-45f9-b862-86edcac3a47b" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_6372065c-7b4b-4c87-91a1-b3a04dfa0dc5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_911696fe-a97f-4a5e-a342-9c0dd3e712b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_54746919-dd02-45f9-b862-86edcac3a47b" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_911696fe-a97f-4a5e-a342-9c0dd3e712b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_2ac65825-22b1-447e-b369-31b59000817a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_54746919-dd02-45f9-b862-86edcac3a47b" xlink:to="loc_us-gaap_LongTermDebt_2ac65825-22b1-447e-b369-31b59000817a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_1f7138ff-55ab-40a7-8359-12efb739dcc0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_54746919-dd02-45f9-b862-86edcac3a47b" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_1f7138ff-55ab-40a7-8359-12efb739dcc0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_defeab27-ad1a-4255-8e24-f4654881c834" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_1f7138ff-55ab-40a7-8359-12efb739dcc0" xlink:to="loc_us-gaap_DebtInstrumentAxis_defeab27-ad1a-4255-8e24-f4654881c834" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_defeab27-ad1a-4255-8e24-f4654881c834_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_defeab27-ad1a-4255-8e24-f4654881c834" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_defeab27-ad1a-4255-8e24-f4654881c834_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_57732575-bb7f-4f9f-a8d8-52b9603d0ce5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_defeab27-ad1a-4255-8e24-f4654881c834" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_57732575-bb7f-4f9f-a8d8-52b9603d0ce5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ConvertibleSeniorNotesMember_d6957517-93fa-43c8-88fb-b7349264fa37" xlink:href="afrm-20220630.xsd#afrm_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_57732575-bb7f-4f9f-a8d8-52b9603d0ce5" xlink:to="loc_afrm_ConvertibleSeniorNotesMember_d6957517-93fa-43c8-88fb-b7349264fa37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_884cabd9-827a-4cfb-9e83-e096d2e491fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_1f7138ff-55ab-40a7-8359-12efb739dcc0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_884cabd9-827a-4cfb-9e83-e096d2e491fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_884cabd9-827a-4cfb-9e83-e096d2e491fc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_884cabd9-827a-4cfb-9e83-e096d2e491fc" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_884cabd9-827a-4cfb-9e83-e096d2e491fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8b0501f3-bdff-4d8e-8fe0-b1692fef990f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_884cabd9-827a-4cfb-9e83-e096d2e491fc" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8b0501f3-bdff-4d8e-8fe0-b1692fef990f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_5d7f406e-8c3b-4697-872d-a468e50291c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8b0501f3-bdff-4d8e-8fe0-b1692fef990f" xlink:to="loc_us-gaap_ConvertibleDebtMember_5d7f406e-8c3b-4697-872d-a468e50291c2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SecuritizationandVariableInterestEntitiesSecuritizationsNarrativeDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SecuritizationandVariableInterestEntitiesSecuritizationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SecuritizationandVariableInterestEntitiesSecuritizationsNarrativeDetails" xlink:type="extended" id="ic817ae06169345f6a21436ab0e3b2d74_SecuritizationandVariableInterestEntitiesSecuritizationsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_18a1239b-f2c6-4a08-ba62-68f333845ef4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrincipalAmountOutstandingOnLoansSecuritized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_18a1239b-f2c6-4a08-ba62-68f333845ef4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizedAssetsPercentageOfResidualCertificatesRetained_9ce4146e-9372-426b-acc6-4642bd383569" xlink:href="afrm-20220630.xsd#afrm_SecuritizedAssetsPercentageOfResidualCertificatesRetained"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_afrm_SecuritizedAssetsPercentageOfResidualCertificatesRetained_9ce4146e-9372-426b-acc6-4642bd383569" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NumberOfClassesOfSecuritizationTrusts_7d25183a-2186-41ce-ac6f-de00542d2204" xlink:href="afrm-20220630.xsd#afrm_NumberOfClassesOfSecuritizationTrusts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_afrm_NumberOfClassesOfSecuritizationTrusts_7d25183a-2186-41ce-ac6f-de00542d2204" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_d356ad02-3dc2-40a4-8ea8-bd4febfca686" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_d356ad02-3dc2-40a4-8ea8-bd4febfca686" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_7b52a272-3a2b-43e0-a42e-53f3e50652da" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_7b52a272-3a2b-43e0-a42e-53f3e50652da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_17d19d7d-6071-43ac-821b-8c790068b302" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_17d19d7d-6071-43ac-821b-8c790068b302" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_be15e9f6-71c6-442b-a22e-94c1821094a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_be15e9f6-71c6-442b-a22e-94c1821094a4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_68b244dd-2fae-478f-8e68-9c50d439ecd2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_LongTermDebt_68b244dd-2fae-478f-8e68-9c50d439ecd2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_cf78dde5-6fcc-4003-9462-9394a4f54cc8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e368dbb9-d68e-4bf9-acbe-3366f77dd6df" xlink:to="loc_us-gaap_DebtInstrumentTable_cf78dde5-6fcc-4003-9462-9394a4f54cc8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_5a6b6692-fd39-47a5-bfb6-c36218d37ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cf78dde5-6fcc-4003-9462-9394a4f54cc8" xlink:to="loc_us-gaap_DebtInstrumentAxis_5a6b6692-fd39-47a5-bfb6-c36218d37ed4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5a6b6692-fd39-47a5-bfb6-c36218d37ed4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5a6b6692-fd39-47a5-bfb6-c36218d37ed4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5a6b6692-fd39-47a5-bfb6-c36218d37ed4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5a6b6692-fd39-47a5-bfb6-c36218d37ed4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020Z2NotesMember_ef8f3533-a252-4a59-8161-5a299ed3570c" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020Z2NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020Z2NotesMember_ef8f3533-a252-4a59-8161-5a299ed3570c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassAMember_8ac86433-c420-4dc0-92b6-3ebee83757d9" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassAMember_8ac86433-c420-4dc0-92b6-3ebee83757d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassBMember_4d67fd5a-5c39-4332-8afb-7c572877680d" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassBMember_4d67fd5a-5c39-4332-8afb-7c572877680d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassCMember_2def6dfe-0bbf-48b8-b50f-82a3eeffe4cf" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesClassCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassCMember_2def6dfe-0bbf-48b8-b50f-82a3eeffe4cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassDMember_98d65fe5-aa02-4b8a-b355-cae2ce8ad6f6" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesClassDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassDMember_98d65fe5-aa02-4b8a-b355-cae2ce8ad6f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassEMember_7b252ab6-28ea-46b9-a42f-e85d9c4950e2" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesClassEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_bfe1fab0-63b1-49fa-a5cc-b2e1acafaffe" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesClassEMember_7b252ab6-28ea-46b9-a42f-e85d9c4950e2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_01ddd668-c3b0-49c4-a8fe-27bfef7d5a20" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020ANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_01ddd668-c3b0-49c4-a8fe-27bfef7d5a20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesClassAMember_57199daf-ab65-406c-a337-f9af774ecd14" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020ANotesClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_01ddd668-c3b0-49c4-a8fe-27bfef7d5a20" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesClassAMember_57199daf-ab65-406c-a337-f9af774ecd14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesClassBMember_d1aea975-0a33-441c-b96e-a9d5b657ea2d" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020ANotesClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_01ddd668-c3b0-49c4-a8fe-27bfef7d5a20" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesClassBMember_d1aea975-0a33-441c-b96e-a9d5b657ea2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesClassCMember_84973e46-8279-4dc8-884e-59e22e7b2c26" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020ANotesClassCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_01ddd668-c3b0-49c4-a8fe-27bfef7d5a20" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesClassCMember_84973e46-8279-4dc8-884e-59e22e7b2c26" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021BNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassAMember_29679079-d54b-4a11-b1eb-b6558f46eefa" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021BNotesClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassAMember_29679079-d54b-4a11-b1eb-b6558f46eefa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassBMember_661aaac4-5caa-461c-bc56-cb777fe045e7" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021BNotesClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassBMember_661aaac4-5caa-461c-bc56-cb777fe045e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassCMember_bebd5860-e3ad-4b1f-9565-36d3666456e4" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021BNotesClassCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassCMember_bebd5860-e3ad-4b1f-9565-36d3666456e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassDMember_ac9111fc-8ec8-4f0a-9f64-71da3fb13258" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021BNotesClassDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassDMember_ac9111fc-8ec8-4f0a-9f64-71da3fb13258" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassEMember_a5fd76e8-09ac-4bc2-b3c2-5244adb1a1db" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021BNotesClassEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesMember_4c580561-81b7-4694-b954-6bf613f80d23" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021BNotesClassEMember_a5fd76e8-09ac-4bc2-b3c2-5244adb1a1db" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020Z1NotesMember_ddd846e4-8774-4284-95a8-34d31d487085" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020Z1NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020Z1NotesMember_ddd846e4-8774-4284-95a8-34d31d487085" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022ANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a775eca8-53fc-4d8f-8513-bc7812cc55bd" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassAMember_d0063d62-0090-4e40-8135-e3cd177fbfb0" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022ANotesClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassAMember_d0063d62-0090-4e40-8135-e3cd177fbfb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassBMember_6b29b9f3-9278-42c8-9cc4-1f3a86573b21" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022ANotesClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassBMember_6b29b9f3-9278-42c8-9cc4-1f3a86573b21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassCMember_83164a27-28dc-4f9e-982b-4ef55d56fc4b" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022ANotesClassCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassCMember_83164a27-28dc-4f9e-982b-4ef55d56fc4b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassDMember_5ab36807-5b24-4041-92b8-1ef63f9256bd" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022ANotesClassDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassDMember_5ab36807-5b24-4041-92b8-1ef63f9256bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassEMember_826aaa75-ed53-4a63-bdbd-a7b38e65c5d4" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022ANotesClassEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesMember_892d7b82-3df6-465b-a1ad-45c5fb621cb7" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022ANotesClassEMember_826aaa75-ed53-4a63-bdbd-a7b38e65c5d4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_4f3b5cd3-34e9-4db5-b44b-e1eeabb54681" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cf78dde5-6fcc-4003-9462-9394a4f54cc8" xlink:to="loc_dei_LegalEntityAxis_4f3b5cd3-34e9-4db5-b44b-e1eeabb54681" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4f3b5cd3-34e9-4db5-b44b-e1eeabb54681_default" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_4f3b5cd3-34e9-4db5-b44b-e1eeabb54681" xlink:to="loc_dei_EntityDomain_4f3b5cd3-34e9-4db5-b44b-e1eeabb54681_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_25a87dce-a342-46ba-a7ce-85283c518e0b" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_4f3b5cd3-34e9-4db5-b44b-e1eeabb54681" xlink:to="loc_dei_EntityDomain_25a87dce-a342-46ba-a7ce-85283c518e0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ThirdPartyLoanBuyerMember_0538c131-2ca8-478b-8bb6-067abe07b040" xlink:href="afrm-20220630.xsd#afrm_ThirdPartyLoanBuyerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_25a87dce-a342-46ba-a7ce-85283c518e0b" xlink:to="loc_afrm_ThirdPartyLoanBuyerMember_0538c131-2ca8-478b-8bb6-067abe07b040" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_c7f4c24b-aecc-4d96-8c4d-3ae4736393ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cf78dde5-6fcc-4003-9462-9394a4f54cc8" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_c7f4c24b-aecc-4d96-8c4d-3ae4736393ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c7f4c24b-aecc-4d96-8c4d-3ae4736393ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c7f4c24b-aecc-4d96-8c4d-3ae4736393ad" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c7f4c24b-aecc-4d96-8c4d-3ae4736393ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3de0a298-e265-4e45-bc9f-381c051cf4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c7f4c24b-aecc-4d96-8c4d-3ae4736393ad" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3de0a298-e265-4e45-bc9f-381c051cf4dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_10de3084-1a3a-4789-8e1c-65aa6e3d5dd8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_3de0a298-e265-4e45-bc9f-381c051cf4dc" xlink:to="loc_us-gaap_SecuredDebtMember_10de3084-1a3a-4789-8e1c-65aa6e3d5dd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis_69edbf88-1059-4cd9-aed2-470145e2cf03" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cf78dde5-6fcc-4003-9462-9394a4f54cc8" xlink:to="loc_us-gaap_PledgedStatusAxis_69edbf88-1059-4cd9-aed2-470145e2cf03" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_69edbf88-1059-4cd9-aed2-470145e2cf03_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PledgedStatusAxis_69edbf88-1059-4cd9-aed2-470145e2cf03" xlink:to="loc_us-gaap_PledgedStatusDomain_69edbf88-1059-4cd9-aed2-470145e2cf03_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_658ab730-a67a-4c71-b161-ef38bf9b8f53" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PledgedStatusAxis_69edbf88-1059-4cd9-aed2-470145e2cf03" xlink:to="loc_us-gaap_PledgedStatusDomain_658ab730-a67a-4c71-b161-ef38bf9b8f53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember_08df147d-b3f8-4596-aa07-9c73d05b2a01" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PledgedStatusDomain_658ab730-a67a-4c71-b161-ef38bf9b8f53" xlink:to="loc_us-gaap_AssetPledgedAsCollateralMember_08df147d-b3f8-4596-aa07-9c73d05b2a01" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromConsolidatedVIEsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromConsolidatedVIEsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromConsolidatedVIEsDetails" xlink:type="extended" id="ia86200e7fcf14adf81552c82d5b0e318_SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromConsolidatedVIEsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_dd2e1a06-97c6-497f-9f61-43b1876213b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_50bf2dcc-40d4-455d-b0ed-fcc70315fc6c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dd2e1a06-97c6-497f-9f61-43b1876213b7" xlink:to="loc_us-gaap_Assets_50bf2dcc-40d4-455d-b0ed-fcc70315fc6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_2d0f8a8a-e858-42ce-99e3-01d337fd58a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dd2e1a06-97c6-497f-9f61-43b1876213b7" xlink:to="loc_us-gaap_Liabilities_2d0f8a8a-e858-42ce-99e3-01d337fd58a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_3bdf32f3-3093-442d-9f15-d083f701d540" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dd2e1a06-97c6-497f-9f61-43b1876213b7" xlink:to="loc_us-gaap_AssetsNet_3bdf32f3-3093-442d-9f15-d083f701d540" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_9c7bd100-75d0-41a7-841d-390f8e50aef7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dd2e1a06-97c6-497f-9f61-43b1876213b7" xlink:to="loc_us-gaap_DebtInstrumentTable_9c7bd100-75d0-41a7-841d-390f8e50aef7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_85cf8709-8144-4b01-966f-fe3621360f27" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9c7bd100-75d0-41a7-841d-390f8e50aef7" xlink:to="loc_srt_ConsolidatedEntitiesAxis_85cf8709-8144-4b01-966f-fe3621360f27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_85cf8709-8144-4b01-966f-fe3621360f27_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_85cf8709-8144-4b01-966f-fe3621360f27" xlink:to="loc_srt_ConsolidatedEntitiesDomain_85cf8709-8144-4b01-966f-fe3621360f27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_338491ee-09ff-4ab6-96b0-112820d394c0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_85cf8709-8144-4b01-966f-fe3621360f27" xlink:to="loc_srt_ConsolidatedEntitiesDomain_338491ee-09ff-4ab6-96b0-112820d394c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_ea87e46d-82e9-4890-aaf9-b872c7fa5a71" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_338491ee-09ff-4ab6-96b0-112820d394c0" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_ea87e46d-82e9-4890-aaf9-b872c7fa5a71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_13915dad-b4e2-414c-b48c-edd789c80f9c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9c7bd100-75d0-41a7-841d-390f8e50aef7" xlink:to="loc_us-gaap_CreditFacilityAxis_13915dad-b4e2-414c-b48c-edd789c80f9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_13915dad-b4e2-414c-b48c-edd789c80f9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_13915dad-b4e2-414c-b48c-edd789c80f9c" xlink:to="loc_us-gaap_CreditFacilityDomain_13915dad-b4e2-414c-b48c-edd789c80f9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_9195057a-c9d8-4418-af49-bf9785002252" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_13915dad-b4e2-414c-b48c-edd789c80f9c" xlink:to="loc_us-gaap_CreditFacilityDomain_9195057a-c9d8-4418-af49-bf9785002252" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_WarehouseCreditFacilityMember_1d9af4e6-bfdb-4d32-a4b5-5e12bc9fd3c8" xlink:href="afrm-20220630.xsd#afrm_WarehouseCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9195057a-c9d8-4418-af49-bf9785002252" xlink:to="loc_afrm_WarehouseCreditFacilityMember_1d9af4e6-bfdb-4d32-a4b5-5e12bc9fd3c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizationMember_f12afbdd-4f80-4d08-aaba-a8603ab0c683" xlink:href="afrm-20220630.xsd#afrm_SecuritizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9195057a-c9d8-4418-af49-bf9785002252" xlink:to="loc_afrm_SecuritizationMember_f12afbdd-4f80-4d08-aaba-a8603ab0c683" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SecuritizationandVariableInterestEntitiesUnconsolidatedVIEsNarrativeDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SecuritizationandVariableInterestEntitiesUnconsolidatedVIEsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SecuritizationandVariableInterestEntitiesUnconsolidatedVIEsNarrativeDetails" xlink:type="extended" id="ib6b515d604ef42e2a86bf59606e4f748_SecuritizationandVariableInterestEntitiesUnconsolidatedVIEsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizedAssetsPercentageOfResidualCertificatesRetained_9516cee7-65f9-4116-ac47-7c6abfa1b331" xlink:href="afrm-20220630.xsd#afrm_SecuritizedAssetsPercentageOfResidualCertificatesRetained"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_SecuritizedAssetsPercentageOfResidualCertificatesRetained_9516cee7-65f9-4116-ac47-7c6abfa1b331" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizedAssetsPercentageOfCertificatesOwned_4dc8736a-b6a6-40de-8c68-7a1abe02c3f2" xlink:href="afrm-20220630.xsd#afrm_SecuritizedAssetsPercentageOfCertificatesOwned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_SecuritizedAssetsPercentageOfCertificatesOwned_4dc8736a-b6a6-40de-8c68-7a1abe02c3f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_fd9d7e38-8b8f-4f15-bba8-3f4e2786e164" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_fd9d7e38-8b8f-4f15-bba8-3f4e2786e164" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_c6c8228e-8c9f-4a15-b24f-640f2db55e85" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_c6c8228e-8c9f-4a15-b24f-640f2db55e85" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_0919acb9-4ac1-4ec4-8e3a-7f4287c7031c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_0919acb9-4ac1-4ec4-8e3a-7f4287c7031c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_0f46b759-ef90-4e9a-8b29-7c4f52a03053" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrincipalAmountOutstandingOnLoansSecuritized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_0f46b759-ef90-4e9a-8b29-7c4f52a03053" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizedAssetsPercentageOfResidualCertificatesSold_06a81b3a-c29b-4508-9a54-31ef1b298d08" xlink:href="afrm-20220630.xsd#afrm_SecuritizedAssetsPercentageOfResidualCertificatesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_SecuritizedAssetsPercentageOfResidualCertificatesSold_06a81b3a-c29b-4508-9a54-31ef1b298d08" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NumberOfThirdPartyInvestorsInSecuritizedAssets_37d12428-ab45-4684-8bc7-96e1ec3c686e" xlink:href="afrm-20220630.xsd#afrm_NumberOfThirdPartyInvestorsInSecuritizedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_NumberOfThirdPartyInvestorsInSecuritizedAssets_37d12428-ab45-4684-8bc7-96e1ec3c686e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtInstrumentGainLossOnSaleOfLoans_7d1066df-2791-4122-9b65-c4c12df806d9" xlink:href="afrm-20220630.xsd#afrm_DebtInstrumentGainLossOnSaleOfLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_DebtInstrumentGainLossOnSaleOfLoans_7d1066df-2791-4122-9b65-c4c12df806d9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NumberOfThirdPartyLoanBuyersInSecuritizedAssets_08bb53af-5f9a-462b-8b45-b227399b4c03" xlink:href="afrm-20220630.xsd#afrm_NumberOfThirdPartyLoanBuyersInSecuritizedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_NumberOfThirdPartyLoanBuyersInSecuritizedAssets_08bb53af-5f9a-462b-8b45-b227399b4c03" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NumberOfClassesOfSecuritizationTrusts_6fe045b5-2169-44eb-9576-f9c789683a60" xlink:href="afrm-20220630.xsd#afrm_NumberOfClassesOfSecuritizationTrusts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_afrm_NumberOfClassesOfSecuritizationTrusts_6fe045b5-2169-44eb-9576-f9c789683a60" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_dbb4abde-213c-456f-8352-a8692ea3564b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_RepaymentsOfDebt_dbb4abde-213c-456f-8352-a8692ea3564b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_cd85cbad-770f-4d99-a4a0-9a231cc1e08e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_cd85cbad-770f-4d99-a4a0-9a231cc1e08e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9db3360-d9a2-437b-8906-36589cbee6a2" xlink:to="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_e8622859-7275-4cd1-b76e-a8aeee28e91e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:to="loc_us-gaap_DebtInstrumentAxis_e8622859-7275-4cd1-b76e-a8aeee28e91e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_e8622859-7275-4cd1-b76e-a8aeee28e91e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_e8622859-7275-4cd1-b76e-a8aeee28e91e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_e8622859-7275-4cd1-b76e-a8aeee28e91e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_e8622859-7275-4cd1-b76e-a8aeee28e91e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z1NotesMember_7a9acdb6-a9da-499e-af8c-3c20542c80d9" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z1NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z1NotesMember_7a9acdb6-a9da-499e-af8c-3c20542c80d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z2NotesMember_c8eabd7c-8b82-454a-82c1-3d20d43d94a1" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z2NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z2NotesMember_c8eabd7c-8b82-454a-82c1-3d20d43d94a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022X1NotesMember_91ea750a-64af-4e2f-8ef4-2aa78516ff88" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022X1NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022X1NotesMember_91ea750a-64af-4e2f-8ef4-2aa78516ff88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesMember_2532229b-cd8b-4951-a9ed-5df10ee1f7ee" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022Z1NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesMember_2532229b-cd8b-4951-a9ed-5df10ee1f7ee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z1NotesResidualCertificatesMember_65a57ace-f346-4ddd-8708-21ef413579b5" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z1NotesResidualCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z1NotesResidualCertificatesMember_65a57ace-f346-4ddd-8708-21ef413579b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z2NotesResidualCertificatesMember_f9c2489c-cc12-4e24-950f-e7cf646d9018" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z2NotesResidualCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z2NotesResidualCertificatesMember_f9c2489c-cc12-4e24-950f-e7cf646d9018" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022X1NotesResidualCertificatesMember_41aa2e25-3e83-4148-8280-a3ff52dff4dc" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022X1NotesResidualCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022X1NotesResidualCertificatesMember_41aa2e25-3e83-4148-8280-a3ff52dff4dc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesResidualCertificatesMember_d338a13f-1b3b-449e-ab54-5b40b519adcd" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022Z1NotesResidualCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesResidualCertificatesMember_d338a13f-1b3b-449e-ab54-5b40b519adcd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_4657de07-91dc-4e58-bd1b-ad402fe9c409" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021ANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021ANotesMember_4657de07-91dc-4e58-bd1b-ad402fe9c409" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020Z2NotesMember_0e708b95-55c4-4649-a473-864387a4c5a0" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020Z2NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020Z2NotesMember_0e708b95-55c4-4649-a473-864387a4c5a0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2021Z1And2021Z2NotesMember_8edd7268-3ca7-472c-aeb8-8adb29311916" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2021Z1And2021Z2NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2021Z1And2021Z2NotesMember_8edd7268-3ca7-472c-aeb8-8adb29311916" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesClassAMember_2ca04e3b-1f0d-4682-8685-2cc6075dda77" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022Z1NotesClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesClassAMember_2ca04e3b-1f0d-4682-8685-2cc6075dda77" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesClassBMember_64522d40-9608-4976-ba90-1f528c025720" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2022Z1NotesClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2022Z1NotesClassBMember_64522d40-9608-4976-ba90-1f528c025720" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_acff3f27-6978-48d8-b140-0fcc03ee401a" xlink:href="afrm-20220630.xsd#afrm_AffirmAssetSecuritizationTrust2020ANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bb32817c-c463-4939-bf4d-9fadd83e554e" xlink:to="loc_afrm_AffirmAssetSecuritizationTrust2020ANotesMember_acff3f27-6978-48d8-b140-0fcc03ee401a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_a4010209-5d70-438d-8635-149a0873c97c" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:to="loc_dei_LegalEntityAxis_a4010209-5d70-438d-8635-149a0873c97c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a4010209-5d70-438d-8635-149a0873c97c_default" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_a4010209-5d70-438d-8635-149a0873c97c" xlink:to="loc_dei_EntityDomain_a4010209-5d70-438d-8635-149a0873c97c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ab2155dd-f1dc-49d6-989f-75aa9a059d5b" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_a4010209-5d70-438d-8635-149a0873c97c" xlink:to="loc_dei_EntityDomain_ab2155dd-f1dc-49d6-989f-75aa9a059d5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ThirdPartyLoanBuyerMember_95bb3c2a-a4f0-4a48-88ed-343652c7ba89" xlink:href="afrm-20220630.xsd#afrm_ThirdPartyLoanBuyerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ab2155dd-f1dc-49d6-989f-75aa9a059d5b" xlink:to="loc_afrm_ThirdPartyLoanBuyerMember_95bb3c2a-a4f0-4a48-88ed-343652c7ba89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_765d4c4b-05df-4421-806c-f700e536d249" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_765d4c4b-05df-4421-806c-f700e536d249" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_765d4c4b-05df-4421-806c-f700e536d249_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_765d4c4b-05df-4421-806c-f700e536d249" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_765d4c4b-05df-4421-806c-f700e536d249_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_cb15e6b1-8bb2-4406-858d-2fc09a6c6123" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_765d4c4b-05df-4421-806c-f700e536d249" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_cb15e6b1-8bb2-4406-858d-2fc09a6c6123" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_591ddb83-f386-408b-bcf1-af2a3322baeb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_cb15e6b1-8bb2-4406-858d-2fc09a6c6123" xlink:to="loc_us-gaap_SecuredDebtMember_591ddb83-f386-408b-bcf1-af2a3322baeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_RepurchaseAgreementMember_3b9bfbef-1f50-48f3-8657-8f9614ab8532" xlink:href="afrm-20220630.xsd#afrm_RepurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_cb15e6b1-8bb2-4406-858d-2fc09a6c6123" xlink:to="loc_afrm_RepurchaseAgreementMember_3b9bfbef-1f50-48f3-8657-8f9614ab8532" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_cf047221-4af0-4754-82f5-a74a90fb35c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_cb15e6b1-8bb2-4406-858d-2fc09a6c6123" xlink:to="loc_us-gaap_LineOfCreditMember_cf047221-4af0-4754-82f5-a74a90fb35c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis_877c4ef5-773b-4c44-8c87-21e60addf4bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:to="loc_us-gaap_PledgedStatusAxis_877c4ef5-773b-4c44-8c87-21e60addf4bb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_877c4ef5-773b-4c44-8c87-21e60addf4bb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PledgedStatusAxis_877c4ef5-773b-4c44-8c87-21e60addf4bb" xlink:to="loc_us-gaap_PledgedStatusDomain_877c4ef5-773b-4c44-8c87-21e60addf4bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_98f16cc7-f465-4ffb-93eb-6aacc6e39d13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PledgedStatusAxis_877c4ef5-773b-4c44-8c87-21e60addf4bb" xlink:to="loc_us-gaap_PledgedStatusDomain_98f16cc7-f465-4ffb-93eb-6aacc6e39d13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember_37b2f203-8cd4-4aa6-8ca6-44db6424de9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PledgedStatusDomain_98f16cc7-f465-4ffb-93eb-6aacc6e39d13" xlink:to="loc_us-gaap_AssetPledgedAsCollateralMember_37b2f203-8cd4-4aa6-8ca6-44db6424de9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_ed9e791a-2571-4a36-827e-4361508ddbb0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a2730dc3-9643-45b2-aa59-073f0efcc7e7" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_ed9e791a-2571-4a36-827e-4361508ddbb0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ed9e791a-2571-4a36-827e-4361508ddbb0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ed9e791a-2571-4a36-827e-4361508ddbb0" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ed9e791a-2571-4a36-827e-4361508ddbb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_a3af5cec-050c-4263-9a23-2d48d826e4f1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ed9e791a-2571-4a36-827e-4361508ddbb0" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_a3af5cec-050c-4263-9a23-2d48d826e4f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_OtherReceivablesMember_3fe3a3b4-1eb9-4882-90dd-4bb04c2b2914" xlink:href="afrm-20220630.xsd#afrm_OtherReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_a3af5cec-050c-4263-9a23-2d48d826e4f1" xlink:to="loc_afrm_OtherReceivablesMember_3fe3a3b4-1eb9-4882-90dd-4bb04c2b2914" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_ff4c1aa0-211d-4d95-af3f-ceb0ea8489d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_a3af5cec-050c-4263-9a23-2d48d826e4f1" xlink:to="loc_us-gaap_OtherAssetsMember_ff4c1aa0-211d-4d95-af3f-ceb0ea8489d0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromUnconsolidatedVIEsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromUnconsolidatedVIEsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromUnconsolidatedVIEsDetails" xlink:type="extended" id="i21e0cd55ddee41acb4ece75a3ac3139b_SecuritizationsandVariableInterestEntitiesAggregateCarryingValueofFinancialAssetsandLiabilitiesfromUnconsolidatedVIEsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_2fb95ee7-f6f6-4630-b730-6401f6901489" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_7a689646-2725-4e13-9bbe-d123671af2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2fb95ee7-f6f6-4630-b730-6401f6901489" xlink:to="loc_us-gaap_Assets_7a689646-2725-4e13-9bbe-d123671af2fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_e24de3a0-0fd1-4603-9933-97b36babe7f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2fb95ee7-f6f6-4630-b730-6401f6901489" xlink:to="loc_us-gaap_Liabilities_e24de3a0-0fd1-4603-9933-97b36babe7f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_cb9ff179-fb5b-4701-9665-b153d376c9f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2fb95ee7-f6f6-4630-b730-6401f6901489" xlink:to="loc_us-gaap_AssetsNet_cb9ff179-fb5b-4701-9665-b153d376c9f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_936b9b76-fb10-46d0-a8f5-b85a11f39dee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2fb95ee7-f6f6-4630-b730-6401f6901489" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_936b9b76-fb10-46d0-a8f5-b85a11f39dee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_b6ee630c-19b4-42dd-b265-9378b9ee476c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2fb95ee7-f6f6-4630-b730-6401f6901489" xlink:to="loc_us-gaap_DebtInstrumentTable_b6ee630c-19b4-42dd-b265-9378b9ee476c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_90eb05bb-0626-44b4-a142-d45c3c6ae6cc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b6ee630c-19b4-42dd-b265-9378b9ee476c" xlink:to="loc_srt_ConsolidatedEntitiesAxis_90eb05bb-0626-44b4-a142-d45c3c6ae6cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_90eb05bb-0626-44b4-a142-d45c3c6ae6cc_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_90eb05bb-0626-44b4-a142-d45c3c6ae6cc" xlink:to="loc_srt_ConsolidatedEntitiesDomain_90eb05bb-0626-44b4-a142-d45c3c6ae6cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_a7f9c542-fe4a-47e4-9852-cd961ed79701" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_90eb05bb-0626-44b4-a142-d45c3c6ae6cc" xlink:to="loc_srt_ConsolidatedEntitiesDomain_a7f9c542-fe4a-47e4-9852-cd961ed79701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_a7cad777-38bc-46fe-9658-b9d3c750d726" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_a7f9c542-fe4a-47e4-9852-cd961ed79701" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_a7cad777-38bc-46fe-9658-b9d3c750d726" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_bb80573f-c6f1-4373-9672-2740c957a049" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b6ee630c-19b4-42dd-b265-9378b9ee476c" xlink:to="loc_us-gaap_CreditFacilityAxis_bb80573f-c6f1-4373-9672-2740c957a049" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_bb80573f-c6f1-4373-9672-2740c957a049_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_bb80573f-c6f1-4373-9672-2740c957a049" xlink:to="loc_us-gaap_CreditFacilityDomain_bb80573f-c6f1-4373-9672-2740c957a049_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_b1e01f94-ed20-4a74-8819-1a36b838f049" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_bb80573f-c6f1-4373-9672-2740c957a049" xlink:to="loc_us-gaap_CreditFacilityDomain_b1e01f94-ed20-4a74-8819-1a36b838f049" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizationMember_fff6412c-471c-4a60-8874-12a5b21e50d3" xlink:href="afrm-20220630.xsd#afrm_SecuritizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_b1e01f94-ed20-4a74-8819-1a36b838f049" xlink:to="loc_afrm_SecuritizationMember_fff6412c-471c-4a60-8874-12a5b21e50d3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/InvestmentsMarketableSecuritiesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#InvestmentsMarketableSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/InvestmentsMarketableSecuritiesDetails" xlink:type="extended" id="i50d16ea410744f2b96ef856b73b7a771_InvestmentsMarketableSecuritiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesLineItems_e8623498-f51d-4aab-bfef-a1b1ef9c9719" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MarketableSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecurities_00e3a8ae-bc06-46fe-b226-b27c0b7c07bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MarketableSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketableSecuritiesLineItems_e8623498-f51d-4aab-bfef-a1b1ef9c9719" xlink:to="loc_us-gaap_MarketableSecurities_00e3a8ae-bc06-46fe-b226-b27c0b7c07bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesTable_f8306cd0-5d90-4db2-9a5e-ef8420c036a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MarketableSecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MarketableSecuritiesLineItems_e8623498-f51d-4aab-bfef-a1b1ef9c9719" xlink:to="loc_us-gaap_MarketableSecuritiesTable_f8306cd0-5d90-4db2-9a5e-ef8420c036a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_0e75e51f-86f6-4d7f-9eeb-f93b685a70f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_f8306cd0-5d90-4db2-9a5e-ef8420c036a8" xlink:to="loc_us-gaap_FinancialInstrumentAxis_0e75e51f-86f6-4d7f-9eeb-f93b685a70f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0e75e51f-86f6-4d7f-9eeb-f93b685a70f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_0e75e51f-86f6-4d7f-9eeb-f93b685a70f4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0e75e51f-86f6-4d7f-9eeb-f93b685a70f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_0e75e51f-86f6-4d7f-9eeb-f93b685a70f4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_c9aee6bb-5bdb-4310-8d6e-466040f6ec69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_us-gaap_MoneyMarketFundsMember_c9aee6bb-5bdb-4310-8d6e-466040f6ec69" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_b60bf955-61ee-4c20-9a7d-71a60383cf23" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_us-gaap_CertificatesOfDepositMember_b60bf955-61ee-4c20-9a7d-71a60383cf23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_ee484a5a-8852-4971-9f69-5027dfe98e26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_ee484a5a-8852-4971-9f69-5027dfe98e26" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_d915a9a5-7a45-45ee-adef-a7f296eb5b06" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_us-gaap_CommercialPaperMember_d915a9a5-7a45-45ee-adef-a7f296eb5b06" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_f2944fd5-58f1-4108-9344-ca0188ded827" xlink:href="afrm-20220630.xsd#afrm_NonUSGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_f2944fd5-58f1-4108-9344-ca0188ded827" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_afec3aa0-d17b-4ecc-9fd0-131ced0aaa4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_afec3aa0-d17b-4ecc-9fd0-131ced0aaa4d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_27e35716-4dc3-4464-b309-ded9f9ac0637" xlink:href="afrm-20220630.xsd#afrm_SecuritizationNotesReceivableAndCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fd61e5d4-717f-487a-8a51-2aa8786a5c45" xlink:to="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_27e35716-4dc3-4464-b309-ded9f9ac0637" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_ab124a4d-f173-469a-a66a-6d4297ca5af7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_f8306cd0-5d90-4db2-9a5e-ef8420c036a8" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_ab124a4d-f173-469a-a66a-6d4297ca5af7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ab124a4d-f173-469a-a66a-6d4297ca5af7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ab124a4d-f173-469a-a66a-6d4297ca5af7" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ab124a4d-f173-469a-a66a-6d4297ca5af7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_6f8c78ea-f84f-43c3-89a1-d9073fc641f0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ab124a4d-f173-469a-a66a-6d4297ca5af7" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_6f8c78ea-f84f-43c3-89a1-d9073fc641f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_18f117c3-1acb-4c68-aad6-741e2f92ac26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_6f8c78ea-f84f-43c3-89a1-d9073fc641f0" xlink:to="loc_us-gaap_CashEquivalentsMember_18f117c3-1acb-4c68-aad6-741e2f92ac26" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/InvestmentsSecuritiesAvailableforSaleDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#InvestmentsSecuritiesAvailableforSaleDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/InvestmentsSecuritiesAvailableforSaleDetails" xlink:type="extended" id="i93ef24a8e3354ef7a4e43d9cf0a5ea05_InvestmentsSecuritiesAvailableforSaleDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_1d3c89ef-7953-4b32-87f2-79247504b47e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_1d3c89ef-7953-4b32-87f2-79247504b47e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_306f4278-1c41-4e83-bb11-d14a62d54389" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_306f4278-1c41-4e83-bb11-d14a62d54389" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_4f4cf5ea-f053-436b-a741-049a0e5d5ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_4f4cf5ea-f053-436b-a741-049a0e5d5ecb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_faa0647b-186e-47a6-8124-032fb1369716" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_faa0647b-186e-47a6-8124-032fb1369716" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_157371f8-0277-4b9c-9fef-eceb5aaa4af2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_157371f8-0277-4b9c-9fef-eceb5aaa4af2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_c59c849c-bcb7-4c52-916d-caa152e5e017" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_b36d52f1-3a48-4eb1-b569-f3be29fb642a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_c18d4fdf-dd98-46f6-ada0-2ce907f7fa6e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3e957b89-65b1-4f38-ab00-c02cab858cc5" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_c18d4fdf-dd98-46f6-ada0-2ce907f7fa6e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_00d957dc-e713-4ab3-861b-9c78691425db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_c18d4fdf-dd98-46f6-ada0-2ce907f7fa6e" xlink:to="loc_us-gaap_FinancialInstrumentAxis_00d957dc-e713-4ab3-861b-9c78691425db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_00d957dc-e713-4ab3-861b-9c78691425db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_00d957dc-e713-4ab3-861b-9c78691425db" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_00d957dc-e713-4ab3-861b-9c78691425db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_00d957dc-e713-4ab3-861b-9c78691425db" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_8fbced64-ccd4-461d-9977-6b7fb73d9936" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_us-gaap_CertificatesOfDepositMember_8fbced64-ccd4-461d-9977-6b7fb73d9936" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_da2e07df-4b01-40bd-bd0c-8a4e46639592" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_da2e07df-4b01-40bd-bd0c-8a4e46639592" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_7ce7511e-8a86-47e2-8b5e-ab85d209a3fe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_us-gaap_CommercialPaperMember_7ce7511e-8a86-47e2-8b5e-ab85d209a3fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_e47cc34d-2fb6-4691-8d4e-df24cb797f41" xlink:href="afrm-20220630.xsd#afrm_NonUSGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_e47cc34d-2fb6-4691-8d4e-df24cb797f41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_febe0bfa-1b6d-465b-915c-0483d51b9750" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_febe0bfa-1b6d-465b-915c-0483d51b9750" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_c8b56b6a-9ec2-4789-98cc-fbf447f16642" xlink:href="afrm-20220630.xsd#afrm_SecuritizationNotesReceivableAndCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_c8b56b6a-9ec2-4789-98cc-fbf447f16642" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CertificatesOfDepositCorporateBondsCommercialPaperAndUSGovernmentBondsMember_e368f9dd-0080-4d1c-bb4d-247250ad3176" xlink:href="afrm-20220630.xsd#afrm_CertificatesOfDepositCorporateBondsCommercialPaperAndUSGovernmentBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f0d77066-abef-4642-983e-0a141c705934" xlink:to="loc_afrm_CertificatesOfDepositCorporateBondsCommercialPaperAndUSGovernmentBondsMember_e368f9dd-0080-4d1c-bb4d-247250ad3176" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_68911e08-9a90-482f-aa0f-1f063018025d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_c18d4fdf-dd98-46f6-ada0-2ce907f7fa6e" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_68911e08-9a90-482f-aa0f-1f063018025d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_68911e08-9a90-482f-aa0f-1f063018025d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_68911e08-9a90-482f-aa0f-1f063018025d" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_68911e08-9a90-482f-aa0f-1f063018025d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_b31283cd-3474-4972-bc6b-4d8484ea156a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_68911e08-9a90-482f-aa0f-1f063018025d" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_b31283cd-3474-4972-bc6b-4d8484ea156a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_30dc3972-a5ac-4530-8ef2-6aa34984dce3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_b31283cd-3474-4972-bc6b-4d8484ea156a" xlink:to="loc_us-gaap_CashEquivalentsMember_30dc3972-a5ac-4530-8ef2-6aa34984dce3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/InvestmentsAvailableforSaleSecuritieswithUnrealizedLossesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#InvestmentsAvailableforSaleSecuritieswithUnrealizedLossesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/InvestmentsAvailableforSaleSecuritieswithUnrealizedLossesDetails" xlink:type="extended" id="if464c36fe35546efaa853a57f3b1f079_InvestmentsAvailableforSaleSecuritieswithUnrealizedLossesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_c9438661-1f22-4fe0-88db-4e1390953869" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_c9438661-1f22-4fe0-88db-4e1390953869" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_c5d46d4c-80c1-497a-ba77-87086d6e7ca4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_c5d46d4c-80c1-497a-ba77-87086d6e7ca4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_cb857a06-aa69-428d-acdd-637c9762d1b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_cb857a06-aa69-428d-acdd-637c9762d1b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_1f5d68f9-55f7-4890-98b8-928aaae1683d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_1f5d68f9-55f7-4890-98b8-928aaae1683d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_8f03b65b-4693-43a9-bef6-e561d67f725a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_8f03b65b-4693-43a9-bef6-e561d67f725a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_dbe37062-26ec-4dcb-9c4c-2d8dda6606b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_dbe37062-26ec-4dcb-9c4c-2d8dda6606b2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_1df237d1-a6c2-487b-af1d-f68c7a53c36a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_1df237d1-a6c2-487b-af1d-f68c7a53c36a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_494bf056-39ec-4a49-b71a-43a5a11f87cc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_2b79cca4-5854-406e-ac76-f23cc1fbcba2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_494bf056-39ec-4a49-b71a-43a5a11f87cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_e62880ed-b4ef-40e6-a74f-19f729209402" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_494bf056-39ec-4a49-b71a-43a5a11f87cc" xlink:to="loc_us-gaap_FinancialInstrumentAxis_e62880ed-b4ef-40e6-a74f-19f729209402" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e62880ed-b4ef-40e6-a74f-19f729209402_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_e62880ed-b4ef-40e6-a74f-19f729209402" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e62880ed-b4ef-40e6-a74f-19f729209402_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_e62880ed-b4ef-40e6-a74f-19f729209402" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_24acd159-1384-4873-8483-c07d8eb0f8b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:to="loc_us-gaap_CertificatesOfDepositMember_24acd159-1384-4873-8483-c07d8eb0f8b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_c6e043cb-a1fc-44e2-8dbc-0b24d717f168" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_c6e043cb-a1fc-44e2-8dbc-0b24d717f168" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_6ec4cf9a-0ac9-46cd-b914-08e1d747bdf9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:to="loc_us-gaap_CommercialPaperMember_6ec4cf9a-0ac9-46cd-b914-08e1d747bdf9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_bf590587-a636-427f-b051-c1c9925daf42" xlink:href="afrm-20220630.xsd#afrm_NonUSGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:to="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_bf590587-a636-427f-b051-c1c9925daf42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_19abc1e2-c090-43bf-8099-67a81f25dc91" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_19abc1e2-c090-43bf-8099-67a81f25dc91" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_8021088b-593f-4870-aa18-ca33e2635f92" xlink:href="afrm-20220630.xsd#afrm_SecuritizationNotesReceivableAndCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_54b5a142-2816-4387-844b-59e17ab50426" xlink:to="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_8021088b-593f-4870-aa18-ca33e2635f92" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/InvestmentsLengthofContractualMaturitiesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#InvestmentsLengthofContractualMaturitiesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/InvestmentsLengthofContractualMaturitiesDetails" xlink:type="extended" id="ie63dfc635d6b40ebaaaca3d63a2ef1c0_InvestmentsLengthofContractualMaturitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_420a8e62-f698-47ac-9ba9-ba36dad63710" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_420a8e62-f698-47ac-9ba9-ba36dad63710" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_9a6bda7d-4534-40f0-94f7-ce1eeccae49c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_9a6bda7d-4534-40f0-94f7-ce1eeccae49c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_dfaa6fb2-e055-43b8-b2c2-324facccbfe1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_dfaa6fb2-e055-43b8-b2c2-324facccbfe1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_a4e31b1b-cbfc-4050-8e67-c01c098e458e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_a4e31b1b-cbfc-4050-8e67-c01c098e458e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_c1bce624-2a32-451c-b416-783253d69327" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_c1bce624-2a32-451c-b416-783253d69327" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtSecuritiesAvailableForSaleAmortizedCostIncludingCreditLossAllowance_f5ddac02-8aaf-4416-9de1-507cfa600b8d" xlink:href="afrm-20220630.xsd#afrm_DebtSecuritiesAvailableForSaleAmortizedCostIncludingCreditLossAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_afrm_DebtSecuritiesAvailableForSaleAmortizedCostIncludingCreditLossAllowance_f5ddac02-8aaf-4416-9de1-507cfa600b8d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_07a8deba-9596-43b3-8805-cdc2a7cff1ae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_07a8deba-9596-43b3-8805-cdc2a7cff1ae" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesAssetFairValueDisclosure_6b4d380c-6541-4d8e-90e2-ff1d55931e66" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesAssetFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_afrm_ResidualTrustCertificatesAssetFairValueDisclosure_6b4d380c-6541-4d8e-90e2-ff1d55931e66" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_dfd686ce-b3d9-48d7-8b45-62e7143d78b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60f64a80-dd7a-45c3-9e21-02ef031c64bd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_dfd686ce-b3d9-48d7-8b45-62e7143d78b0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_f61e6066-da40-42fe-9318-843934fc1a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_dfd686ce-b3d9-48d7-8b45-62e7143d78b0" xlink:to="loc_us-gaap_FinancialInstrumentAxis_f61e6066-da40-42fe-9318-843934fc1a5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f61e6066-da40-42fe-9318-843934fc1a5c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f61e6066-da40-42fe-9318-843934fc1a5c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f61e6066-da40-42fe-9318-843934fc1a5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f61e6066-da40-42fe-9318-843934fc1a5c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_4c60882d-ca51-4b5e-9208-90e8f90a9dd2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:to="loc_us-gaap_CertificatesOfDepositMember_4c60882d-ca51-4b5e-9208-90e8f90a9dd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_ab764c18-f2cc-4490-91f6-154ee69ddf5c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_ab764c18-f2cc-4490-91f6-154ee69ddf5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_fd84b524-1894-4905-9cff-a65159fda852" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:to="loc_us-gaap_CommercialPaperMember_fd84b524-1894-4905-9cff-a65159fda852" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_022c1d33-a2fd-4ee3-a66a-452cc296d980" xlink:href="afrm-20220630.xsd#afrm_NonUSGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:to="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_022c1d33-a2fd-4ee3-a66a-452cc296d980" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_984a8e63-a02f-4b9f-90f2-becf86931d14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_984a8e63-a02f-4b9f-90f2-becf86931d14" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_4a2be421-b179-4709-b463-e84bc83c309d" xlink:href="afrm-20220630.xsd#afrm_SecuritizationNotesReceivableAndCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8536d9a4-d564-4fcc-ac2b-ba7eba5c3190" xlink:to="loc_afrm_SecuritizationNotesReceivableAndCertificatesMember_4a2be421-b179-4709-b463-e84bc83c309d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15547828-b8b7-45ef-9fe4-4e550125b4cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_dfd686ce-b3d9-48d7-8b45-62e7143d78b0" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15547828-b8b7-45ef-9fe4-4e550125b4cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_15547828-b8b7-45ef-9fe4-4e550125b4cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15547828-b8b7-45ef-9fe4-4e550125b4cf" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_15547828-b8b7-45ef-9fe4-4e550125b4cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_c9210598-19a0-4702-ba73-97300e2cfb95" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_15547828-b8b7-45ef-9fe4-4e550125b4cf" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_c9210598-19a0-4702-ba73-97300e2cfb95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_5136ccff-5dd9-456d-af92-fcb86736381d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_c9210598-19a0-4702-ba73-97300e2cfb95" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_5136ccff-5dd9-456d-af92-fcb86736381d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_e398fc18-488e-4a8d-92db-d9acdec440e1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_dfd686ce-b3d9-48d7-8b45-62e7143d78b0" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_e398fc18-488e-4a8d-92db-d9acdec440e1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_e398fc18-488e-4a8d-92db-d9acdec440e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_e398fc18-488e-4a8d-92db-d9acdec440e1" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_e398fc18-488e-4a8d-92db-d9acdec440e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_255707ec-7142-4fa0-b8b8-32ca6023b3d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_e398fc18-488e-4a8d-92db-d9acdec440e1" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_255707ec-7142-4fa0-b8b8-32ca6023b3d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_6faa3554-4128-4f84-8885-032741ca5476" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_255707ec-7142-4fa0-b8b8-32ca6023b3d4" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_6faa3554-4128-4f84-8885-032741ca5476" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended" id="i9112ce48b93f4586afbc3c5d7d11083c_FairValueofFinancialAssetsandLiabilitiesAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_72be69e0-a700-469b-abb0-35265dfe000b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_72be69e0-a700-469b-abb0-35265dfe000b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_RestrictedCashFairValueDisclosure_adbc126e-ece2-4ac4-8826-c0670a4d7f4d" xlink:href="afrm-20220630.xsd#afrm_RestrictedCashFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_afrm_RestrictedCashFairValueDisclosure_adbc126e-ece2-4ac4-8826-c0670a4d7f4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesAssetFairValueDisclosure_9e09329d-3b24-4f22-8395-bf5b472bcee4" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesAssetFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_afrm_ResidualTrustCertificatesAssetFairValueDisclosure_9e09329d-3b24-4f22-8395-bf5b472bcee4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_DebtSecuritiesAvailableForSaleFairValueDisclosure_b7b40c5d-2aed-4522-b350-1b6947631ffb" xlink:href="afrm-20220630.xsd#afrm_DebtSecuritiesAvailableForSaleFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_afrm_DebtSecuritiesAvailableForSaleFairValueDisclosure_b7b40c5d-2aed-4522-b350-1b6947631ffb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAsset_c73354ed-7228-451e-8634-f6dfb7f3fbd1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_ServicingAsset_c73354ed-7228-451e-8634-f6dfb7f3fbd1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_22db778d-d510-400e-8821-7caea3352a2a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_DerivativeAssets_22db778d-d510-400e-8821-7caea3352a2a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_44be932c-05aa-4d69-a394-40602d7d5a3e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_44be932c-05aa-4d69-a394-40602d7d5a3e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingLiabilityAtFairValueAmount_4a4d1522-74b6-474c-888e-44a419846634" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingLiabilityAtFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_ServicingLiabilityAtFairValueAmount_4a4d1522-74b6-474c-888e-44a419846634" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PerformanceFeeLiabilityFairValueDisclosure_a9ea4406-02c9-4e62-b476-c517678ab78f" xlink:href="afrm-20220630.xsd#afrm_PerformanceFeeLiabilityFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_afrm_PerformanceFeeLiabilityFairValueDisclosure_a9ea4406-02c9-4e62-b476-c517678ab78f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesFairValueDisclosure_2b5ba61e-ea2f-472d-833d-a9df9ad5987a" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_afrm_ResidualTrustCertificatesFairValueDisclosure_2b5ba61e-ea2f-472d-833d-a9df9ad5987a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_3c5a1178-3147-4374-a986-f9b856073026" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_3c5a1178-3147-4374-a986-f9b856073026" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementProfitShareLiabilityFairValueDisclosure_80881a77-902c-4066-b229-9c0bfb68364b" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementProfitShareLiabilityFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_afrm_CommercialAgreementProfitShareLiabilityFairValueDisclosure_80881a77-902c-4066-b229-9c0bfb68364b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_1417b3a8-6f56-438c-bf49-46a887df80e0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_1417b3a8-6f56-438c-bf49-46a887df80e0" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_cec23a86-df57-4c17-967d-0ff334bce112" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_6fd611fa-f949-4673-bcf7-f90be7ad37f8" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_cec23a86-df57-4c17-967d-0ff334bce112" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_42a0d895-6371-4d94-a6e0-a222628f4a54" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_cec23a86-df57-4c17-967d-0ff334bce112" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_42a0d895-6371-4d94-a6e0-a222628f4a54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_42a0d895-6371-4d94-a6e0-a222628f4a54_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_42a0d895-6371-4d94-a6e0-a222628f4a54" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_42a0d895-6371-4d94-a6e0-a222628f4a54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9c9bc7af-50b7-4918-9c47-00ba92d70411" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_42a0d895-6371-4d94-a6e0-a222628f4a54" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9c9bc7af-50b7-4918-9c47-00ba92d70411" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_a6ff54f2-d96a-41c1-9253-e220110628ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9c9bc7af-50b7-4918-9c47-00ba92d70411" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_a6ff54f2-d96a-41c1-9253-e220110628ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_8649161c-3ef2-46a2-9b2e-c61cff518227" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9c9bc7af-50b7-4918-9c47-00ba92d70411" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_8649161c-3ef2-46a2-9b2e-c61cff518227" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_7fae0c01-3e8a-4d03-8443-a6a15172847a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9c9bc7af-50b7-4918-9c47-00ba92d70411" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_7fae0c01-3e8a-4d03-8443-a6a15172847a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_73402b4b-f0f3-409d-b9de-11d95b874d65" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_cec23a86-df57-4c17-967d-0ff334bce112" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_73402b4b-f0f3-409d-b9de-11d95b874d65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_73402b4b-f0f3-409d-b9de-11d95b874d65_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_73402b4b-f0f3-409d-b9de-11d95b874d65" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_73402b4b-f0f3-409d-b9de-11d95b874d65_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9378a52d-5867-48ad-a58c-0a33a68b61f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_73402b4b-f0f3-409d-b9de-11d95b874d65" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9378a52d-5867-48ad-a58c-0a33a68b61f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_ae20d75c-e64a-49d1-9830-86e54b02a940" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_9378a52d-5867-48ad-a58c-0a33a68b61f7" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_ae20d75c-e64a-49d1-9830-86e54b02a940" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_952237c7-1ec5-4247-b901-9d369cfec2e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_cec23a86-df57-4c17-967d-0ff334bce112" xlink:to="loc_us-gaap_FinancialInstrumentAxis_952237c7-1ec5-4247-b901-9d369cfec2e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_952237c7-1ec5-4247-b901-9d369cfec2e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_952237c7-1ec5-4247-b901-9d369cfec2e5" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_952237c7-1ec5-4247-b901-9d369cfec2e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_952237c7-1ec5-4247-b901-9d369cfec2e5" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_cc3829ef-4eeb-4764-a39b-d94f7a5686c1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:to="loc_us-gaap_MoneyMarketFundsMember_cc3829ef-4eeb-4764-a39b-d94f7a5686c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_aab082e9-f3e5-43ad-ad06-e8d02ac45d48" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:to="loc_us-gaap_CertificatesOfDepositMember_aab082e9-f3e5-43ad-ad06-e8d02ac45d48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_316dc418-d118-4ace-b552-ff0d3803ab19" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_316dc418-d118-4ace-b552-ff0d3803ab19" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_74550d4d-3621-49da-8c53-f126fcdc732d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:to="loc_us-gaap_CommercialPaperMember_74550d4d-3621-49da-8c53-f126fcdc732d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_8e7b2253-d5af-46cf-9409-7d7ec34c8b4a" xlink:href="afrm-20220630.xsd#afrm_NonUSGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:to="loc_afrm_NonUSGovernmentAgenciesDebtSecuritiesMember_8e7b2253-d5af-46cf-9409-7d7ec34c8b4a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_fe61eaeb-e3c4-48b4-a36b-fecacb9299bf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12ede1f2-64ff-482b-a3d4-5613bbef39ec" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_fe61eaeb-e3c4-48b4-a36b-fecacb9299bf" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesAdditionalInformationDetails" xlink:type="extended" id="i749b750a820a48febfb4da90a963b003_FairValueofFinancialAssetsandLiabilitiesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_LoansSoldContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding_f94bb397-8b3f-4a1e-88a8-9ba2fc490957" xlink:href="afrm-20220630.xsd#afrm_LoansSoldContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_afrm_LoansSoldContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding_f94bb397-8b3f-4a1e-88a8-9ba2fc490957" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_7fbfe944-8bb8-4ba0-aeef-5e02485c057a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_7fbfe944-8bb8-4ba0-aeef-5e02485c057a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding_db0d72d9-4931-4758-960e-81d248d2cf2d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding_db0d72d9-4931-4758-960e-81d248d2cf2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets_cf7997f8-867a-40a5-8f91-68f53964aa32" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets_cf7997f8-867a-40a5-8f91-68f53964aa32" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAsset_54ae5048-3c92-421b-98c3-ea372f46c65d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_ServicingAsset_54ae5048-3c92-421b-98c3-ea372f46c65d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingLiability_351ecb4f-095d-4049-98ea-c8a843f42b30" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_ServicingLiability_351ecb4f-095d-4049-98ea-c8a843f42b30" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_dc8d5fd3-94b2-4a4a-bd6f-3c3b56011b01" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_dc8d5fd3-94b2-4a4a-bd6f-3c3b56011b01" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_VariableInterestEntityNotPrimaryBeneficiaryRequiredEconomicRiskRetention_9330ac39-e59d-490e-a68a-ab6754dbf2ed" xlink:href="afrm-20220630.xsd#afrm_VariableInterestEntityNotPrimaryBeneficiaryRequiredEconomicRiskRetention"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_afrm_VariableInterestEntityNotPrimaryBeneficiaryRequiredEconomicRiskRetention_9330ac39-e59d-490e-a68a-ab6754dbf2ed" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EscrowDeposit_8d3ac4d6-3eb9-405a-9bae-3825ada5fba8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EscrowDeposit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_EscrowDeposit_8d3ac4d6-3eb9-405a-9bae-3825ada5fba8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_17cd1b4a-fefd-4842-b931-1e9f0dd76917" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_17cd1b4a-fefd-4842-b931-1e9f0dd76917" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_dffc8a0a-30d5-48c2-83d4-74a559a52376" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_dffc8a0a-30d5-48c2-83d4-74a559a52376" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfOtherComprehensiveIncomeExtensibleList_e4425de3-7c2c-4aaa-90c3-d1fe9523aee8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfOtherComprehensiveIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfOtherComprehensiveIncomeExtensibleList_e4425de3-7c2c-4aaa-90c3-d1fe9523aee8" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_f9d3f382-aa5b-463e-a3ac-39570b405045" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a36e828c-fba4-4820-82a3-c0a21e9dbdcc" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_f9d3f382-aa5b-463e-a3ac-39570b405045" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_9c8cd4d4-4b99-41f4-bf0b-da83fd7b72fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_f9d3f382-aa5b-463e-a3ac-39570b405045" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_9c8cd4d4-4b99-41f4-bf0b-da83fd7b72fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9c8cd4d4-4b99-41f4-bf0b-da83fd7b72fc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9c8cd4d4-4b99-41f4-bf0b-da83fd7b72fc" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9c8cd4d4-4b99-41f4-bf0b-da83fd7b72fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c91013ee-8469-4c5e-9345-f89b9c58a748" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_9c8cd4d4-4b99-41f4-bf0b-da83fd7b72fc" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c91013ee-8469-4c5e-9345-f89b9c58a748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ManhattanEngineeringIncMember_7f14839b-d6d3-4a4a-9cd9-3b3ba1204686" xlink:href="afrm-20220630.xsd#afrm_ManhattanEngineeringIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c91013ee-8469-4c5e-9345-f89b9c58a748" xlink:to="loc_afrm_ManhattanEngineeringIncMember_7f14839b-d6d3-4a4a-9cd9-3b3ba1204686" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_b13531ad-a609-40d8-ad9f-faa0f058cace" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_f9d3f382-aa5b-463e-a3ac-39570b405045" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_b13531ad-a609-40d8-ad9f-faa0f058cace" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_b13531ad-a609-40d8-ad9f-faa0f058cace_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_b13531ad-a609-40d8-ad9f-faa0f058cace" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_b13531ad-a609-40d8-ad9f-faa0f058cace_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_3a583728-65af-4b5a-b4bd-709b5405b673" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_b13531ad-a609-40d8-ad9f-faa0f058cace" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_3a583728-65af-4b5a-b4bd-709b5405b673" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SeniorNotesAndResidualTrustCertificatesMember_50fc26eb-695b-4ea6-ad69-702a462cba3c" xlink:href="afrm-20220630.xsd#afrm_SeniorNotesAndResidualTrustCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_3a583728-65af-4b5a-b4bd-709b5405b673" xlink:to="loc_afrm_SeniorNotesAndResidualTrustCertificatesMember_50fc26eb-695b-4ea6-ad69-702a462cba3c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforServicingAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforServicingAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforServicingAssetsandLiabilitiesDetails" xlink:type="extended" id="i870ec1a48b904e7c8047c2b2b40aceb8_FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforServicingAssetsandLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_734def32-9746-42b3-b001-3d5f613d78d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetMeasurementInput_c4a9a361-0da6-454f-9192-04ef978ce9fe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingAssetMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_734def32-9746-42b3-b001-3d5f613d78d5" xlink:to="loc_us-gaap_ServicingAssetMeasurementInput_c4a9a361-0da6-454f-9192-04ef978ce9fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingLiabilityMeasurementInput_8c603882-5541-4097-83eb-f9fcfdcc06dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServicingLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_734def32-9746-42b3-b001-3d5f613d78d5" xlink:to="loc_us-gaap_ServicingLiabilityMeasurementInput_8c603882-5541-4097-83eb-f9fcfdcc06dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c8c8aaea-56d0-45be-b7cc-e457fcebc327" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_734def32-9746-42b3-b001-3d5f613d78d5" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c8c8aaea-56d0-45be-b7cc-e457fcebc327" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_86d0d5b6-62ca-4ccb-803a-53255ae2d350" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c8c8aaea-56d0-45be-b7cc-e457fcebc327" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_86d0d5b6-62ca-4ccb-803a-53255ae2d350" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_86d0d5b6-62ca-4ccb-803a-53255ae2d350_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_86d0d5b6-62ca-4ccb-803a-53255ae2d350" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_86d0d5b6-62ca-4ccb-803a-53255ae2d350_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_b9f402d1-9fff-46b9-9deb-7a89e40cea5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_86d0d5b6-62ca-4ccb-803a-53255ae2d350" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_b9f402d1-9fff-46b9-9deb-7a89e40cea5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_cff03d30-0a72-4903-9fe6-d03e60d47efd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_b9f402d1-9fff-46b9-9deb-7a89e40cea5d" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_cff03d30-0a72-4903-9fe6-d03e60d47efd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputAdequateCompensationMember_74fa7a0d-da13-4382-8db8-76774e8d3ca2" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputAdequateCompensationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_b9f402d1-9fff-46b9-9deb-7a89e40cea5d" xlink:to="loc_afrm_MeasurementInputAdequateCompensationMember_74fa7a0d-da13-4382-8db8-76774e8d3ca2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDefaultRateMember_4d16c8de-0295-4b63-97b7-35d0c95af25c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDefaultRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_b9f402d1-9fff-46b9-9deb-7a89e40cea5d" xlink:to="loc_us-gaap_MeasurementInputDefaultRateMember_4d16c8de-0295-4b63-97b7-35d0c95af25c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2d2cc042-3e56-4e8f-8a73-f03b6c9feda7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c8c8aaea-56d0-45be-b7cc-e457fcebc327" xlink:to="loc_srt_RangeAxis_2d2cc042-3e56-4e8f-8a73-f03b6c9feda7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2d2cc042-3e56-4e8f-8a73-f03b6c9feda7_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2d2cc042-3e56-4e8f-8a73-f03b6c9feda7" xlink:to="loc_srt_RangeMember_2d2cc042-3e56-4e8f-8a73-f03b6c9feda7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_0ce34cf4-cedc-4f6f-80eb-30d5f515616e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2d2cc042-3e56-4e8f-8a73-f03b6c9feda7" xlink:to="loc_srt_RangeMember_0ce34cf4-cedc-4f6f-80eb-30d5f515616e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_5244a91c-0235-4527-aa1f-57f2f7e75e5f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0ce34cf4-cedc-4f6f-80eb-30d5f515616e" xlink:to="loc_srt_MinimumMember_5244a91c-0235-4527-aa1f-57f2f7e75e5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_fd93d88f-2bd8-4ff8-898d-961641808e1e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0ce34cf4-cedc-4f6f-80eb-30d5f515616e" xlink:to="loc_srt_MaximumMember_fd93d88f-2bd8-4ff8-898d-961641808e1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_074b890f-329e-43b0-a9ff-6c55630bd1a4" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0ce34cf4-cedc-4f6f-80eb-30d5f515616e" xlink:to="loc_srt_WeightedAverageMember_074b890f-329e-43b0-a9ff-6c55630bd1a4" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforServicingAssetsandLiabilitiesInputsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforServicingAssetsandLiabilitiesInputsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforServicingAssetsandLiabilitiesInputsDetails" xlink:type="extended" id="i63d01a3cb19745d2ae37f35fd20f5743_FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforServicingAssetsandLiabilitiesInputsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_bc83599d-e650-4a90-a382-904b76767a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueServicingAssetEffectOfTwentyFivePercentagePointIncreaseInMeasurementInput_d7e6a102-b052-4981-8d09-62293573177d" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueServicingAssetEffectOfTwentyFivePercentagePointIncreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_bc83599d-e650-4a90-a382-904b76767a4b" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueServicingAssetEffectOfTwentyFivePercentagePointIncreaseInMeasurementInput_d7e6a102-b052-4981-8d09-62293573177d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueServicingAssetEffectOfFiftyPercentagePointIncreaseInMeasurementInput_352933d5-573e-48c2-a690-dd374a8113d8" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueServicingAssetEffectOfFiftyPercentagePointIncreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_bc83599d-e650-4a90-a382-904b76767a4b" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueServicingAssetEffectOfFiftyPercentagePointIncreaseInMeasurementInput_352933d5-573e-48c2-a690-dd374a8113d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueServicingLiabilityEffectOfTwentyFivePercentagePointIncreaseInMeasurementInput_a3abda0c-bfae-4cd8-a9ba-2d664c87b5eb" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueServicingLiabilityEffectOfTwentyFivePercentagePointIncreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_bc83599d-e650-4a90-a382-904b76767a4b" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueServicingLiabilityEffectOfTwentyFivePercentagePointIncreaseInMeasurementInput_a3abda0c-bfae-4cd8-a9ba-2d664c87b5eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueServicingLiabilityEffectOfFiftyPercentagePointIncreaseInMeasurementInput_9d586aa7-beb2-48af-9175-045ae96fe019" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueServicingLiabilityEffectOfFiftyPercentagePointIncreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_bc83599d-e650-4a90-a382-904b76767a4b" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueServicingLiabilityEffectOfFiftyPercentagePointIncreaseInMeasurementInput_9d586aa7-beb2-48af-9175-045ae96fe019" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_ed9fd553-3a94-4801-b0d3-f58ecabde7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_bc83599d-e650-4a90-a382-904b76767a4b" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_ed9fd553-3a94-4801-b0d3-f58ecabde7cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_6060e21d-545a-4113-a8ce-64f2138c1684" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_ed9fd553-3a94-4801-b0d3-f58ecabde7cb" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_6060e21d-545a-4113-a8ce-64f2138c1684" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_6060e21d-545a-4113-a8ce-64f2138c1684_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_6060e21d-545a-4113-a8ce-64f2138c1684" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_6060e21d-545a-4113-a8ce-64f2138c1684_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_90d2a8d5-0d08-4e5e-be04-59eab586a2b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_6060e21d-545a-4113-a8ce-64f2138c1684" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_90d2a8d5-0d08-4e5e-be04-59eab586a2b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDefaultRateMember_c8341d19-d46c-4587-9c5e-67c5e18ccce6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDefaultRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_90d2a8d5-0d08-4e5e-be04-59eab586a2b7" xlink:to="loc_us-gaap_MeasurementInputDefaultRateMember_c8341d19-d46c-4587-9c5e-67c5e18ccce6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputAdequateCompensationMember_de55659e-7fb9-4ee2-aa59-939f9bbd0a60" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputAdequateCompensationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_90d2a8d5-0d08-4e5e-be04-59eab586a2b7" xlink:to="loc_afrm_MeasurementInputAdequateCompensationMember_de55659e-7fb9-4ee2-aa59-939f9bbd0a60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_12fac58c-e676-4451-bc61-15e32baeb57d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_90d2a8d5-0d08-4e5e-be04-59eab586a2b7" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_12fac58c-e676-4451-bc61-15e32baeb57d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofPerformanceFeeLiabilityDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofPerformanceFeeLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofPerformanceFeeLiabilityDetails" xlink:type="extended" id="i0c914ef83355412ba66c4e466151bed6_FairValueofFinancialAssetsandLiabilitiesFairValueofPerformanceFeeLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_45f2675e-2de2-41fe-98d8-4197d800f522" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_8f6845e2-689a-40ba-b0dd-8858073c2b0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_45f2675e-2de2-41fe-98d8-4197d800f522" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_8f6845e2-689a-40ba-b0dd-8858073c2b0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_0342a4f5-dbea-4610-a363-8906df04e638" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_8f6845e2-689a-40ba-b0dd-8858073c2b0a" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_0342a4f5-dbea-4610-a363-8906df04e638" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_4cd86c71-3c8e-4ac9-8708-ac817dc9abaa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_8f6845e2-689a-40ba-b0dd-8858073c2b0a" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_4cd86c71-3c8e-4ac9-8708-ac817dc9abaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_c512a806-dcea-4048-8323-c61ded98dc19" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_8f6845e2-689a-40ba-b0dd-8858073c2b0a" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_c512a806-dcea-4048-8323-c61ded98dc19" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_780bb93a-096a-4588-aac6-2624a43c9f28" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_8f6845e2-689a-40ba-b0dd-8858073c2b0a" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_780bb93a-096a-4588-aac6-2624a43c9f28" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_f706678a-6cf7-464a-aece-c7c59dcc655e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7ffa6f38-3aaa-44d1-a654-e50213d4b930" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_45f2675e-2de2-41fe-98d8-4197d800f522" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7ffa6f38-3aaa-44d1-a654-e50213d4b930" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_b5b8a3c2-df3e-4231-84d7-13284571c0ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7ffa6f38-3aaa-44d1-a654-e50213d4b930" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_b5b8a3c2-df3e-4231-84d7-13284571c0ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_b5b8a3c2-df3e-4231-84d7-13284571c0ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_b5b8a3c2-df3e-4231-84d7-13284571c0ea" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_b5b8a3c2-df3e-4231-84d7-13284571c0ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5c234b71-7d7a-4400-948f-6f20bc1243c9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_b5b8a3c2-df3e-4231-84d7-13284571c0ea" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5c234b71-7d7a-4400-948f-6f20bc1243c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PerformanceFeeLiabilityMember_0931f979-442e-4e1e-bf48-85f46a6d40f0" xlink:href="afrm-20220630.xsd#afrm_PerformanceFeeLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5c234b71-7d7a-4400-948f-6f20bc1243c9" xlink:to="loc_afrm_PerformanceFeeLiabilityMember_0931f979-442e-4e1e-bf48-85f46a6d40f0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforPerformanceFeeLiabilityDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforPerformanceFeeLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforPerformanceFeeLiabilityDetails" xlink:type="extended" id="i4a8c8e90d0b64e3da5a6a0ebfdaeecac_FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforPerformanceFeeLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_f5896bf0-94b1-4e25-8213-c338083dcc92" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PerformanceFeeLiabilityMeasurementInput_33efc4e3-ff1e-4ea6-88fa-9970acb21da8" xlink:href="afrm-20220630.xsd#afrm_PerformanceFeeLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_f5896bf0-94b1-4e25-8213-c338083dcc92" xlink:to="loc_afrm_PerformanceFeeLiabilityMeasurementInput_33efc4e3-ff1e-4ea6-88fa-9970acb21da8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_3e2bcf9d-32a4-4663-bd4f-11a3384a540d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_f5896bf0-94b1-4e25-8213-c338083dcc92" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_3e2bcf9d-32a4-4663-bd4f-11a3384a540d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_74fa1d8e-bb6d-43b2-93a4-900df54dab82" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_3e2bcf9d-32a4-4663-bd4f-11a3384a540d" xlink:to="loc_srt_RangeAxis_74fa1d8e-bb6d-43b2-93a4-900df54dab82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_74fa1d8e-bb6d-43b2-93a4-900df54dab82_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_74fa1d8e-bb6d-43b2-93a4-900df54dab82" xlink:to="loc_srt_RangeMember_74fa1d8e-bb6d-43b2-93a4-900df54dab82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d5110517-130a-4f20-a8e6-6c14585bd3a2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_74fa1d8e-bb6d-43b2-93a4-900df54dab82" xlink:to="loc_srt_RangeMember_d5110517-130a-4f20-a8e6-6c14585bd3a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_c2cf3706-4e5e-4117-afbd-f3956cc69bd2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d5110517-130a-4f20-a8e6-6c14585bd3a2" xlink:to="loc_srt_MinimumMember_c2cf3706-4e5e-4117-afbd-f3956cc69bd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_00655e63-9497-4a4a-925a-524009a95e81" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d5110517-130a-4f20-a8e6-6c14585bd3a2" xlink:to="loc_srt_MaximumMember_00655e63-9497-4a4a-925a-524009a95e81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_f94dd269-cd63-4d9e-9f60-ebdc3354f1de" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d5110517-130a-4f20-a8e6-6c14585bd3a2" xlink:to="loc_srt_WeightedAverageMember_f94dd269-cd63-4d9e-9f60-ebdc3354f1de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_bc4e3a5f-5e34-4b45-983c-a0d347f3b620" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_3e2bcf9d-32a4-4663-bd4f-11a3384a540d" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_bc4e3a5f-5e34-4b45-983c-a0d347f3b620" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_bc4e3a5f-5e34-4b45-983c-a0d347f3b620_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_bc4e3a5f-5e34-4b45-983c-a0d347f3b620" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_bc4e3a5f-5e34-4b45-983c-a0d347f3b620_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_f411d2e0-c814-4929-b8e6-1d05b79af57a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_bc4e3a5f-5e34-4b45-983c-a0d347f3b620" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_f411d2e0-c814-4929-b8e6-1d05b79af57a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_ffafe44b-aee1-4f95-ab56-fdac42c1bd37" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_f411d2e0-c814-4929-b8e6-1d05b79af57a" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_ffafe44b-aee1-4f95-ab56-fdac42c1bd37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputRefundRateMember_e4c002a5-c598-4d95-9ee0-f30375fc1435" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputRefundRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_f411d2e0-c814-4929-b8e6-1d05b79af57a" xlink:to="loc_afrm_MeasurementInputRefundRateMember_e4c002a5-c598-4d95-9ee0-f30375fc1435" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDefaultRateMember_ef287ef0-76e7-48f6-b5f9-c9adb7dcb895" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDefaultRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_f411d2e0-c814-4929-b8e6-1d05b79af57a" xlink:to="loc_us-gaap_MeasurementInputDefaultRateMember_ef287ef0-76e7-48f6-b5f9-c9adb7dcb895" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofResidualTrustCertificatesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofResidualTrustCertificatesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofResidualTrustCertificatesDetails" xlink:type="extended" id="ic33633c9add34574906167c6793ea8df_FairValueofFinancialAssetsandLiabilitiesFairValueofResidualTrustCertificatesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6bab41e0-4ec9-4e6c-a9fe-971a1890599f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_c1fb9d64-d8f2-4e24-b884-0a80ec499448" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6bab41e0-4ec9-4e6c-a9fe-971a1890599f" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_c1fb9d64-d8f2-4e24-b884-0a80ec499448" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_63ea0492-8188-445c-9a84-b000a2e80876" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_c1fb9d64-d8f2-4e24-b884-0a80ec499448" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_63ea0492-8188-445c-9a84-b000a2e80876" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_ea08c583-155c-42b0-9bf8-28cfb84260b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_c1fb9d64-d8f2-4e24-b884-0a80ec499448" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_ea08c583-155c-42b0-9bf8-28cfb84260b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_599f0a3a-cdd2-4594-aa3a-f0153302b594" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_c1fb9d64-d8f2-4e24-b884-0a80ec499448" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_599f0a3a-cdd2-4594-aa3a-f0153302b594" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_25a2ecb3-55cd-4e59-a5e6-d045c1238fe7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_c1fb9d64-d8f2-4e24-b884-0a80ec499448" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_25a2ecb3-55cd-4e59-a5e6-d045c1238fe7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_b91f3144-f478-4969-b1c6-eea2a0681c02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_60af66bf-8afe-45b5-9058-571ec9a4a6a3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6bab41e0-4ec9-4e6c-a9fe-971a1890599f" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_60af66bf-8afe-45b5-9058-571ec9a4a6a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_55609ef2-3ec3-4771-9973-faf3c05bb03c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_60af66bf-8afe-45b5-9058-571ec9a4a6a3" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_55609ef2-3ec3-4771-9973-faf3c05bb03c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_55609ef2-3ec3-4771-9973-faf3c05bb03c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_55609ef2-3ec3-4771-9973-faf3c05bb03c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_55609ef2-3ec3-4771-9973-faf3c05bb03c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_652c2081-95e5-4c6d-b771-905535d35d81" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_55609ef2-3ec3-4771-9973-faf3c05bb03c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_652c2081-95e5-4c6d-b771-905535d35d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesHeldByThirdPartiesInConsolidatedVIEsMember_2de2cde8-d9fd-4991-96dd-8b8c2f55e790" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesHeldByThirdPartiesInConsolidatedVIEsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_652c2081-95e5-4c6d-b771-905535d35d81" xlink:to="loc_afrm_ResidualTrustCertificatesHeldByThirdPartiesInConsolidatedVIEsMember_2de2cde8-d9fd-4991-96dd-8b8c2f55e790" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforResidualTrustCertificatesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforResidualTrustCertificatesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforResidualTrustCertificatesDetails" xlink:type="extended" id="i6b3d123b6ab64c5690269791a51187fa_FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforResidualTrustCertificatesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_91b08b3f-9a7d-4df3-89e1-7614258bedf4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesMeasurementInput_c7bc9330-c600-49db-9cfb-c4ad4d627a17" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_91b08b3f-9a7d-4df3-89e1-7614258bedf4" xlink:to="loc_afrm_ResidualTrustCertificatesMeasurementInput_c7bc9330-c600-49db-9cfb-c4ad4d627a17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_669b649b-232c-4824-952c-68fe37c2a083" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_91b08b3f-9a7d-4df3-89e1-7614258bedf4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_669b649b-232c-4824-952c-68fe37c2a083" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_9f8759dc-d611-4838-982b-c89875c1df94" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_669b649b-232c-4824-952c-68fe37c2a083" xlink:to="loc_srt_RangeAxis_9f8759dc-d611-4838-982b-c89875c1df94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9f8759dc-d611-4838-982b-c89875c1df94_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_9f8759dc-d611-4838-982b-c89875c1df94" xlink:to="loc_srt_RangeMember_9f8759dc-d611-4838-982b-c89875c1df94_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_03e9c44a-eb9d-4a7e-8a1f-39c2a88a25b8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_9f8759dc-d611-4838-982b-c89875c1df94" xlink:to="loc_srt_RangeMember_03e9c44a-eb9d-4a7e-8a1f-39c2a88a25b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_6cfee123-b6d1-4461-a1a5-5ee2d923f3dc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_03e9c44a-eb9d-4a7e-8a1f-39c2a88a25b8" xlink:to="loc_srt_MinimumMember_6cfee123-b6d1-4461-a1a5-5ee2d923f3dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_10f4695f-4c2f-4776-b51c-95263b2857de" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_03e9c44a-eb9d-4a7e-8a1f-39c2a88a25b8" xlink:to="loc_srt_MaximumMember_10f4695f-4c2f-4776-b51c-95263b2857de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_9dfda2b8-c703-4a73-9b77-5dbe81708d86" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_03e9c44a-eb9d-4a7e-8a1f-39c2a88a25b8" xlink:to="loc_srt_WeightedAverageMember_9dfda2b8-c703-4a73-9b77-5dbe81708d86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_829b2420-cb38-45af-9cdf-2b697f712239" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_669b649b-232c-4824-952c-68fe37c2a083" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_829b2420-cb38-45af-9cdf-2b697f712239" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_829b2420-cb38-45af-9cdf-2b697f712239_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_829b2420-cb38-45af-9cdf-2b697f712239" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_829b2420-cb38-45af-9cdf-2b697f712239_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_b56726b4-abfc-4230-9190-9778076e0851" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_829b2420-cb38-45af-9cdf-2b697f712239" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_b56726b4-abfc-4230-9190-9778076e0851" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_49625902-65d0-4f6c-b8c4-cb196ae48869" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_b56726b4-abfc-4230-9190-9778076e0851" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_49625902-65d0-4f6c-b8c4-cb196ae48869" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputLossRateMember_4ea8d0a1-968f-4a09-8776-f762919d1e65" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputLossRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_b56726b4-abfc-4230-9190-9778076e0851" xlink:to="loc_afrm_MeasurementInputLossRateMember_4ea8d0a1-968f-4a09-8776-f762919d1e65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPrepaymentRateMember_e550f0ff-8105-4de1-99fe-8482fcc54cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPrepaymentRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_b56726b4-abfc-4230-9190-9778076e0851" xlink:to="loc_us-gaap_MeasurementInputPrepaymentRateMember_e550f0ff-8105-4de1-99fe-8482fcc54cb7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_6b5b0310-36cc-45f3-9fba-edf4f4d8430a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_669b649b-232c-4824-952c-68fe37c2a083" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_6b5b0310-36cc-45f3-9fba-edf4f4d8430a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6b5b0310-36cc-45f3-9fba-edf4f4d8430a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_6b5b0310-36cc-45f3-9fba-edf4f4d8430a" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6b5b0310-36cc-45f3-9fba-edf4f4d8430a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_75725b69-36b6-4098-9514-8f427c976d32" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_6b5b0310-36cc-45f3-9fba-edf4f4d8430a" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_75725b69-36b6-4098-9514-8f427c976d32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesHeldByThirdPartiesInConsolidatedVIEsMember_ee561a23-de1e-4bc5-b6c5-8c21d88a4eb0" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesHeldByThirdPartiesInConsolidatedVIEsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_75725b69-36b6-4098-9514-8f427c976d32" xlink:to="loc_afrm_ResidualTrustCertificatesHeldByThirdPartiesInConsolidatedVIEsMember_ee561a23-de1e-4bc5-b6c5-8c21d88a4eb0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforResidualTrustCertificatesInputsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforResidualTrustCertificatesInputsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforResidualTrustCertificatesInputsDetails" xlink:type="extended" id="i9f856d6f912f4431abaca94fc0806a4a_FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforResidualTrustCertificatesInputsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_50f716b8-c9d1-46d0-a1e9-fcc7e9daa0ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueResidualTrustCertificatesLiabilityEffectOfTwentyFivePercentagePointDecreaseInMeasurementInput_68fa9098-0fe7-4ed7-82d7-ea108e76165b" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueResidualTrustCertificatesLiabilityEffectOfTwentyFivePercentagePointDecreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_50f716b8-c9d1-46d0-a1e9-fcc7e9daa0ec" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueResidualTrustCertificatesLiabilityEffectOfTwentyFivePercentagePointDecreaseInMeasurementInput_68fa9098-0fe7-4ed7-82d7-ea108e76165b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueResidualTrustCertificatesLiabilityEffectOfFiftyPercentagePointDecreaseInMeasurementInput_5ef6534b-7395-4544-8ea8-3f996534abbc" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueResidualTrustCertificatesLiabilityEffectOfFiftyPercentagePointDecreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_50f716b8-c9d1-46d0-a1e9-fcc7e9daa0ec" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueResidualTrustCertificatesLiabilityEffectOfFiftyPercentagePointDecreaseInMeasurementInput_5ef6534b-7395-4544-8ea8-3f996534abbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_5d042bd2-a7f9-4c2f-9be3-e7193161e929" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_50f716b8-c9d1-46d0-a1e9-fcc7e9daa0ec" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_5d042bd2-a7f9-4c2f-9be3-e7193161e929" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_68cd8f00-e7ff-4d73-857c-a752ffec9e99" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_5d042bd2-a7f9-4c2f-9be3-e7193161e929" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_68cd8f00-e7ff-4d73-857c-a752ffec9e99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_68cd8f00-e7ff-4d73-857c-a752ffec9e99_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_68cd8f00-e7ff-4d73-857c-a752ffec9e99" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_68cd8f00-e7ff-4d73-857c-a752ffec9e99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_16e52ee1-9de0-468d-a847-6897a6788c13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_68cd8f00-e7ff-4d73-857c-a752ffec9e99" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_16e52ee1-9de0-468d-a847-6897a6788c13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_75839e36-f420-44b5-90fe-3b3de4722231" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_16e52ee1-9de0-468d-a847-6897a6788c13" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_75839e36-f420-44b5-90fe-3b3de4722231" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputLossRateMember_63d28c89-4e17-4088-a4c1-e481b3fb3354" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputLossRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_16e52ee1-9de0-468d-a847-6897a6788c13" xlink:to="loc_afrm_MeasurementInputLossRateMember_63d28c89-4e17-4088-a4c1-e481b3fb3354" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPrepaymentRateMember_fe4bb20d-4bd2-4f2b-bb2a-53959f6f7017" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPrepaymentRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_16e52ee1-9de0-468d-a847-6897a6788c13" xlink:to="loc_us-gaap_MeasurementInputPrepaymentRateMember_fe4bb20d-4bd2-4f2b-bb2a-53959f6f7017" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofSeniorNotesandResidualTrustCertificatesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofSeniorNotesandResidualTrustCertificatesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofSeniorNotesandResidualTrustCertificatesDetails" xlink:type="extended" id="ia55d2adf853b47649df9b88af2412fb6_FairValueofFinancialAssetsandLiabilitiesFairValueofSeniorNotesandResidualTrustCertificatesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_aa58cf3e-6df3-4604-80c4-5fc883cebca0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_aa58cf3e-6df3-4604-80c4-5fc883cebca0" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1b2f567a-27b1-4acb-ac06-ce81c2eab3ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1b2f567a-27b1-4acb-ac06-ce81c2eab3ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityAdditions_cc016864-9aba-4970-b8ae-2b774c7be64d" xlink:href="afrm-20220630.xsd#afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:to="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityAdditions_cc016864-9aba-4970-b8ae-2b774c7be64d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementAndSales_54919660-c199-4180-870d-ea86c88bca52" xlink:href="afrm-20220630.xsd#afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementAndSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:to="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementAndSales_54919660-c199-4180-870d-ea86c88bca52" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_9fe38927-884e-4b48-827a-3674ba642d47" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_9fe38927-884e-4b48-827a-3674ba642d47" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_59c5013b-3ae8-4e6e-97d2-594cb2a5049a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_59c5013b-3ae8-4e6e-97d2-594cb2a5049a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityImpairmentOnSecuritiesAvailableForSale_d65d61fb-8c69-418b-bec2-0e742da6ace3" xlink:href="afrm-20220630.xsd#afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityImpairmentOnSecuritiesAvailableForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_6f15d7ea-580a-4a1d-b22d-899afab93408" xlink:to="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityImpairmentOnSecuritiesAvailableForSale_d65d61fb-8c69-418b-bec2-0e742da6ace3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_397e3881-f112-4037-a5c1-dc3e26624944" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_394239fc-8ffe-47f4-931e-e4413c3a4847" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_aa58cf3e-6df3-4604-80c4-5fc883cebca0" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_394239fc-8ffe-47f4-931e-e4413c3a4847" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_cac6bba9-43ab-4bfa-a46f-812f008b353c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_394239fc-8ffe-47f4-931e-e4413c3a4847" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_cac6bba9-43ab-4bfa-a46f-812f008b353c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_cac6bba9-43ab-4bfa-a46f-812f008b353c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_cac6bba9-43ab-4bfa-a46f-812f008b353c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_cac6bba9-43ab-4bfa-a46f-812f008b353c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5543a67f-84a1-4515-82be-c21f5a0b8e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_cac6bba9-43ab-4bfa-a46f-812f008b353c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5543a67f-84a1-4515-82be-c21f5a0b8e9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SeniorNotesAndResidualTrustCertificatesMember_a6807546-41e2-4698-8ac0-d5e3535792bd" xlink:href="afrm-20220630.xsd#afrm_SeniorNotesAndResidualTrustCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5543a67f-84a1-4515-82be-c21f5a0b8e9d" xlink:to="loc_afrm_SeniorNotesAndResidualTrustCertificatesMember_a6807546-41e2-4698-8ac0-d5e3535792bd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforSeniorNotesandResidualTrustCertificatedDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforSeniorNotesandResidualTrustCertificatedDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforSeniorNotesandResidualTrustCertificatedDetails" xlink:type="extended" id="i31af9068ca8c43e68ae8b9123ce27e9f_FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforSeniorNotesandResidualTrustCertificatedDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_305769d0-b760-4f0d-a62a-15a5e63d6d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ResidualTrustCertificatesMeasurementInput_798a7269-c016-471e-9e0b-5dc68fdc84cc" xlink:href="afrm-20220630.xsd#afrm_ResidualTrustCertificatesMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_305769d0-b760-4f0d-a62a-15a5e63d6d9b" xlink:to="loc_afrm_ResidualTrustCertificatesMeasurementInput_798a7269-c016-471e-9e0b-5dc68fdc84cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_949d7d31-e903-4b6e-966e-35bc10facc12" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_305769d0-b760-4f0d-a62a-15a5e63d6d9b" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_949d7d31-e903-4b6e-966e-35bc10facc12" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_8fd697d0-e6f5-46bf-a1e8-441ab5351dae" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_949d7d31-e903-4b6e-966e-35bc10facc12" xlink:to="loc_srt_RangeAxis_8fd697d0-e6f5-46bf-a1e8-441ab5351dae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8fd697d0-e6f5-46bf-a1e8-441ab5351dae_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_8fd697d0-e6f5-46bf-a1e8-441ab5351dae" xlink:to="loc_srt_RangeMember_8fd697d0-e6f5-46bf-a1e8-441ab5351dae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_aba1302b-6d83-4b61-99d2-f653e4128f26" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_8fd697d0-e6f5-46bf-a1e8-441ab5351dae" xlink:to="loc_srt_RangeMember_aba1302b-6d83-4b61-99d2-f653e4128f26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_7cffcc24-e36f-4ecd-bd9f-59f9094d3947" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_aba1302b-6d83-4b61-99d2-f653e4128f26" xlink:to="loc_srt_MinimumMember_7cffcc24-e36f-4ecd-bd9f-59f9094d3947" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d9e1f7b5-7e8a-4730-8a7b-040e526ac447" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_aba1302b-6d83-4b61-99d2-f653e4128f26" xlink:to="loc_srt_MaximumMember_d9e1f7b5-7e8a-4730-8a7b-040e526ac447" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_497bdac4-cce0-4de7-93cc-92fbaa443042" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_aba1302b-6d83-4b61-99d2-f653e4128f26" xlink:to="loc_srt_WeightedAverageMember_497bdac4-cce0-4de7-93cc-92fbaa443042" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_ebc62130-6d84-4833-b8bd-14d38425ed8c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_949d7d31-e903-4b6e-966e-35bc10facc12" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_ebc62130-6d84-4833-b8bd-14d38425ed8c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_ebc62130-6d84-4833-b8bd-14d38425ed8c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_ebc62130-6d84-4833-b8bd-14d38425ed8c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_ebc62130-6d84-4833-b8bd-14d38425ed8c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_65fe147a-01c3-4b7b-a890-b92a09e6c194" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_ebc62130-6d84-4833-b8bd-14d38425ed8c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_65fe147a-01c3-4b7b-a890-b92a09e6c194" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SeniorNotesAndResidualTrustCertificatesMember_a0624010-e99d-4b3d-a204-8e2cd3ea16ca" xlink:href="afrm-20220630.xsd#afrm_SeniorNotesAndResidualTrustCertificatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_65fe147a-01c3-4b7b-a890-b92a09e6c194" xlink:to="loc_afrm_SeniorNotesAndResidualTrustCertificatesMember_a0624010-e99d-4b3d-a204-8e2cd3ea16ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_f128fe4e-58ec-465e-9f4f-75925ed8e28c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_949d7d31-e903-4b6e-966e-35bc10facc12" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_f128fe4e-58ec-465e-9f4f-75925ed8e28c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_f128fe4e-58ec-465e-9f4f-75925ed8e28c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_f128fe4e-58ec-465e-9f4f-75925ed8e28c" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_f128fe4e-58ec-465e-9f4f-75925ed8e28c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_e0c0fe6f-9cca-4008-a7be-0fe694fe78bc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_f128fe4e-58ec-465e-9f4f-75925ed8e28c" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_e0c0fe6f-9cca-4008-a7be-0fe694fe78bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_e58fb249-a8c5-417f-9023-a20a07039c63" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_e0c0fe6f-9cca-4008-a7be-0fe694fe78bc" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_e58fb249-a8c5-417f-9023-a20a07039c63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputLossRateMember_b6b8fef3-4696-4f78-912d-fcf3180d487d" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputLossRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_e0c0fe6f-9cca-4008-a7be-0fe694fe78bc" xlink:to="loc_afrm_MeasurementInputLossRateMember_b6b8fef3-4696-4f78-912d-fcf3180d487d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPrepaymentRateMember_14cd4ba0-1dd4-4a5e-a36e-e5ac88e9bdfb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPrepaymentRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_e0c0fe6f-9cca-4008-a7be-0fe694fe78bc" xlink:to="loc_us-gaap_MeasurementInputPrepaymentRateMember_14cd4ba0-1dd4-4a5e-a36e-e5ac88e9bdfb" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforSecuritizationNotesandResidualTrustCertificatesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforSecuritizationNotesandResidualTrustCertificatesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforSecuritizationNotesandResidualTrustCertificatesDetails" xlink:type="extended" id="i9c50f15223ca49d28c61e93e32d5f35a_FairValueofFinancialAssetsandLiabilitiesSummaryofAdverseChangesinEstimatesforSecuritizationNotesandResidualTrustCertificatesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_21e75f17-fa08-48bc-884d-9feb382b58aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueSecuritizationNotesAndResidualTrustCertificatesLiabilityEffectOfTwentyFivePercentagePointIncreaseDecreaseInMeasurementInput_b7972016-809a-4293-ae55-db09eca3a6f0" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueSecuritizationNotesAndResidualTrustCertificatesLiabilityEffectOfTwentyFivePercentagePointIncreaseDecreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_21e75f17-fa08-48bc-884d-9feb382b58aa" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueSecuritizationNotesAndResidualTrustCertificatesLiabilityEffectOfTwentyFivePercentagePointIncreaseDecreaseInMeasurementInput_b7972016-809a-4293-ae55-db09eca3a6f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SensitivityAnalysisOfFairValueSecuritizationNotesAndResidualTrustCertificatesLiabilityEffectOfFiftyPercentagePointIncreaseDecreaseInMeasurementInput_01436a1c-7f24-47d9-8016-b39a35c067e0" xlink:href="afrm-20220630.xsd#afrm_SensitivityAnalysisOfFairValueSecuritizationNotesAndResidualTrustCertificatesLiabilityEffectOfFiftyPercentagePointIncreaseDecreaseInMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_21e75f17-fa08-48bc-884d-9feb382b58aa" xlink:to="loc_afrm_SensitivityAnalysisOfFairValueSecuritizationNotesAndResidualTrustCertificatesLiabilityEffectOfFiftyPercentagePointIncreaseDecreaseInMeasurementInput_01436a1c-7f24-47d9-8016-b39a35c067e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_e8d09f80-f04c-4e86-9990-ab1a297cca5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_21e75f17-fa08-48bc-884d-9feb382b58aa" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_e8d09f80-f04c-4e86-9990-ab1a297cca5d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_f6da8ef5-e234-420a-b137-4d81a16d9d7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_e8d09f80-f04c-4e86-9990-ab1a297cca5d" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_f6da8ef5-e234-420a-b137-4d81a16d9d7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_f6da8ef5-e234-420a-b137-4d81a16d9d7f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_f6da8ef5-e234-420a-b137-4d81a16d9d7f" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_f6da8ef5-e234-420a-b137-4d81a16d9d7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_9af255fc-7b8f-4771-afd5-380a2b5c4009" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_f6da8ef5-e234-420a-b137-4d81a16d9d7f" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_9af255fc-7b8f-4771-afd5-380a2b5c4009" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_c660c4ab-38cc-4e58-afca-f573988a6c38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_9af255fc-7b8f-4771-afd5-380a2b5c4009" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_c660c4ab-38cc-4e58-afca-f573988a6c38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputLossRateMember_7fafdea6-4baa-49ee-a2ab-fca3f726a144" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputLossRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_9af255fc-7b8f-4771-afd5-380a2b5c4009" xlink:to="loc_afrm_MeasurementInputLossRateMember_7fafdea6-4baa-49ee-a2ab-fca3f726a144" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPrepaymentRateMember_1c132a73-854a-4442-bc4d-6acd56ad6096" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPrepaymentRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_9af255fc-7b8f-4771-afd5-380a2b5c4009" xlink:to="loc_us-gaap_MeasurementInputPrepaymentRateMember_1c132a73-854a-4442-bc4d-6acd56ad6096" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofContingentConsiderationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofContingentConsiderationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofContingentConsiderationDetails" xlink:type="extended" id="i4caf49a672364669a0c264856c9709e0_FairValueofFinancialAssetsandLiabilitiesFairValueofContingentConsiderationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_473f68e6-1a5a-4ea3-bdea-7b7726173f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_225488ff-2e2d-4955-8a65-dcf2ee44aa84" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_473f68e6-1a5a-4ea3-bdea-7b7726173f0e" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_225488ff-2e2d-4955-8a65-dcf2ee44aa84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_e0340207-a624-44e5-af95-84c44804e511" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_225488ff-2e2d-4955-8a65-dcf2ee44aa84" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_e0340207-a624-44e5-af95-84c44804e511" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4791f640-604a-4bb8-a9bc-ca569334ac6f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_225488ff-2e2d-4955-8a65-dcf2ee44aa84" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4791f640-604a-4bb8-a9bc-ca569334ac6f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_4a1e44bb-8492-49c9-8978-4a11d4784245" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_225488ff-2e2d-4955-8a65-dcf2ee44aa84" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_4a1e44bb-8492-49c9-8978-4a11d4784245" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_15000bc6-60c0-47c9-b8dd-586353044c75" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_225488ff-2e2d-4955-8a65-dcf2ee44aa84" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_15000bc6-60c0-47c9-b8dd-586353044c75" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_3097ebda-eb6d-4cbb-824f-b451486026df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f0868821-83ab-4bec-b23d-4f301aece9f6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_473f68e6-1a5a-4ea3-bdea-7b7726173f0e" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f0868821-83ab-4bec-b23d-4f301aece9f6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_5b049c1c-ec1c-401f-808e-2d383efad06c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f0868821-83ab-4bec-b23d-4f301aece9f6" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_5b049c1c-ec1c-401f-808e-2d383efad06c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5b049c1c-ec1c-401f-808e-2d383efad06c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_5b049c1c-ec1c-401f-808e-2d383efad06c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_5b049c1c-ec1c-401f-808e-2d383efad06c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e67118de-4801-4dea-8fc2-9b32d8711840" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_5b049c1c-ec1c-401f-808e-2d383efad06c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e67118de-4801-4dea-8fc2-9b32d8711840" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ContingentConsiderationMember_87655011-3f56-4225-8d2f-2d286a3c7784" xlink:href="afrm-20220630.xsd#afrm_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e67118de-4801-4dea-8fc2-9b32d8711840" xlink:to="loc_afrm_ContingentConsiderationMember_87655011-3f56-4225-8d2f-2d286a3c7784" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforContingentConsiderationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforContingentConsiderationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforContingentConsiderationDetails" xlink:type="extended" id="ieaedb1c645064477ae915ea034454257_FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforContingentConsiderationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_418587e3-b4e8-4170-a6ad-f356692ce4a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_7c7cce28-9083-4d78-bf0b-a0b567204586" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_418587e3-b4e8-4170-a6ad-f356692ce4a0" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_7c7cce28-9083-4d78-bf0b-a0b567204586" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_b9598853-c0fb-4c62-b039-f59872b09068" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_418587e3-b4e8-4170-a6ad-f356692ce4a0" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_b9598853-c0fb-4c62-b039-f59872b09068" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f8ef9641-c4a6-4c49-b990-bb6043021648" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_b9598853-c0fb-4c62-b039-f59872b09068" xlink:to="loc_srt_RangeAxis_f8ef9641-c4a6-4c49-b990-bb6043021648" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f8ef9641-c4a6-4c49-b990-bb6043021648_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_f8ef9641-c4a6-4c49-b990-bb6043021648" xlink:to="loc_srt_RangeMember_f8ef9641-c4a6-4c49-b990-bb6043021648_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2f9f5b08-e2a1-4ee4-b27d-08383d0376e1" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_f8ef9641-c4a6-4c49-b990-bb6043021648" xlink:to="loc_srt_RangeMember_2f9f5b08-e2a1-4ee4-b27d-08383d0376e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_be71de74-6394-463c-91dc-e2cbfcf335d3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2f9f5b08-e2a1-4ee4-b27d-08383d0376e1" xlink:to="loc_srt_MinimumMember_be71de74-6394-463c-91dc-e2cbfcf335d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ab949abb-aeb1-4820-a8dc-f0ed4ac3207e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2f9f5b08-e2a1-4ee4-b27d-08383d0376e1" xlink:to="loc_srt_MaximumMember_ab949abb-aeb1-4820-a8dc-f0ed4ac3207e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_6c9e268c-096c-4b96-9ed8-95a882028121" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2f9f5b08-e2a1-4ee4-b27d-08383d0376e1" xlink:to="loc_srt_WeightedAverageMember_6c9e268c-096c-4b96-9ed8-95a882028121" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_603260d1-20d0-4cc2-baae-774efd11d74e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_b9598853-c0fb-4c62-b039-f59872b09068" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_603260d1-20d0-4cc2-baae-774efd11d74e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_603260d1-20d0-4cc2-baae-774efd11d74e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_603260d1-20d0-4cc2-baae-774efd11d74e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_603260d1-20d0-4cc2-baae-774efd11d74e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_344e3743-b1f8-40ba-a59c-28141397e92a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_603260d1-20d0-4cc2-baae-774efd11d74e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_344e3743-b1f8-40ba-a59c-28141397e92a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_12ecdac7-c83d-43e2-9254-d006748fd4b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_344e3743-b1f8-40ba-a59c-28141397e92a" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_12ecdac7-c83d-43e2-9254-d006748fd4b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputEquityVolatilityMember_e05e75ea-08f9-4210-8463-019c3d7ffde0" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputEquityVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_344e3743-b1f8-40ba-a59c-28141397e92a" xlink:to="loc_afrm_MeasurementInputEquityVolatilityMember_e05e75ea-08f9-4210-8463-019c3d7ffde0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputRevenueVolatilityMember_8c59bb79-da8b-42a6-bfdb-0f1b046bafda" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputRevenueVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_344e3743-b1f8-40ba-a59c-28141397e92a" xlink:to="loc_afrm_MeasurementInputRevenueVolatilityMember_8c59bb79-da8b-42a6-bfdb-0f1b046bafda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_b872c75b-cced-46a5-9de6-ba5edce8d77f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_b9598853-c0fb-4c62-b039-f59872b09068" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_b872c75b-cced-46a5-9de6-ba5edce8d77f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_b872c75b-cced-46a5-9de6-ba5edce8d77f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_b872c75b-cced-46a5-9de6-ba5edce8d77f" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_b872c75b-cced-46a5-9de6-ba5edce8d77f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_75dc360c-6049-4cf7-9da2-5a50a10a5ddc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_b872c75b-cced-46a5-9de6-ba5edce8d77f" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_75dc360c-6049-4cf7-9da2-5a50a10a5ddc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ContingentConsiderationMember_7a91f80b-6654-4877-82d0-d33394f08117" xlink:href="afrm-20220630.xsd#afrm_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_75dc360c-6049-4cf7-9da2-5a50a10a5ddc" xlink:to="loc_afrm_ContingentConsiderationMember_7a91f80b-6654-4877-82d0-d33394f08117" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofProfitShareLiabilityDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesFairValueofProfitShareLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFairValueofProfitShareLiabilityDetails" xlink:type="extended" id="i423ef79b61b64a9cb66bda30906c2f4d_FairValueofFinancialAssetsandLiabilitiesFairValueofProfitShareLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_5917d3ad-9815-47b6-af46-a8ca1a424d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f6ae8925-f220-467c-9096-116a256268be" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_5917d3ad-9815-47b6-af46-a8ca1a424d9d" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f6ae8925-f220-467c-9096-116a256268be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_e80f8567-a0da-46a4-bf78-4f2b8ee9ff8b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f6ae8925-f220-467c-9096-116a256268be" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_e80f8567-a0da-46a4-bf78-4f2b8ee9ff8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityFacilitationOfLoans_7ca1c43b-ae60-4c71-977f-fcfe4ee561b9" xlink:href="afrm-20220630.xsd#afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityFacilitationOfLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f6ae8925-f220-467c-9096-116a256268be" xlink:to="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityFacilitationOfLoans_7ca1c43b-ae60-4c71-977f-fcfe4ee561b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityActualGainLoss_7b2b1e16-a941-421f-9dbe-3ab7ba312b95" xlink:href="afrm-20220630.xsd#afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityActualGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f6ae8925-f220-467c-9096-116a256268be" xlink:to="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityActualGainLoss_7b2b1e16-a941-421f-9dbe-3ab7ba312b95" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySubsequentChangesToFairValue_b3c268bf-839c-486b-b7ef-1be821ea7c38" xlink:href="afrm-20220630.xsd#afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySubsequentChangesToFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f6ae8925-f220-467c-9096-116a256268be" xlink:to="loc_afrm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySubsequentChangesToFairValue_b3c268bf-839c-486b-b7ef-1be821ea7c38" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_b5bf1a6a-2728-453c-bf00-73a27b8d1b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_54fcaa88-dcee-4201-9ab1-108e037e4b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_5917d3ad-9815-47b6-af46-a8ca1a424d9d" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_54fcaa88-dcee-4201-9ab1-108e037e4b7e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_edcae63f-35cc-49da-9117-435ef05863ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_54fcaa88-dcee-4201-9ab1-108e037e4b7e" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_edcae63f-35cc-49da-9117-435ef05863ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_edcae63f-35cc-49da-9117-435ef05863ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_edcae63f-35cc-49da-9117-435ef05863ea" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_edcae63f-35cc-49da-9117-435ef05863ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_4af28a63-fc76-4f37-b000-f8f20e1f469d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_edcae63f-35cc-49da-9117-435ef05863ea" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_4af28a63-fc76-4f37-b000-f8f20e1f469d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementProfitShareLiabilityMember_f6863047-dbc8-4945-9436-1b44cc3ed5b1" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementProfitShareLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_4af28a63-fc76-4f37-b000-f8f20e1f469d" xlink:to="loc_afrm_CommercialAgreementProfitShareLiabilityMember_f6863047-dbc8-4945-9436-1b44cc3ed5b1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforProfitShareLiabilityDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforProfitShareLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforProfitShareLiabilityDetails" xlink:type="extended" id="i49b0ba29cd9a46fabf252ccf9e2e4210_FairValueofFinancialAssetsandLiabilitiesQuantitativeInformationAboutSignificantUnobservableInputsforProfitShareLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_85c48324-796b-4c7e-b7b5-85e184602520" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementProfitShareLiabilityMeasurementInput_4c0c027f-7ae8-472e-9156-b58488771425" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementProfitShareLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_85c48324-796b-4c7e-b7b5-85e184602520" xlink:to="loc_afrm_CommercialAgreementProfitShareLiabilityMeasurementInput_4c0c027f-7ae8-472e-9156-b58488771425" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_d09a4931-a58d-4e04-9c19-faad0c7392c9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_85c48324-796b-4c7e-b7b5-85e184602520" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_d09a4931-a58d-4e04-9c19-faad0c7392c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_3ea18c30-a6f9-4872-8365-c7d50cd2888c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_d09a4931-a58d-4e04-9c19-faad0c7392c9" xlink:to="loc_srt_RangeAxis_3ea18c30-a6f9-4872-8365-c7d50cd2888c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3ea18c30-a6f9-4872-8365-c7d50cd2888c_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_3ea18c30-a6f9-4872-8365-c7d50cd2888c" xlink:to="loc_srt_RangeMember_3ea18c30-a6f9-4872-8365-c7d50cd2888c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_0fd8113f-82b9-47b6-b61e-f7ab3681c8c9" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_3ea18c30-a6f9-4872-8365-c7d50cd2888c" xlink:to="loc_srt_RangeMember_0fd8113f-82b9-47b6-b61e-f7ab3681c8c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ac3d2927-f203-47af-a786-977b977dcc24" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0fd8113f-82b9-47b6-b61e-f7ab3681c8c9" xlink:to="loc_srt_MinimumMember_ac3d2927-f203-47af-a786-977b977dcc24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ef30b2b0-1b19-40b9-891f-7366c2ce4ed2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0fd8113f-82b9-47b6-b61e-f7ab3681c8c9" xlink:to="loc_srt_MaximumMember_ef30b2b0-1b19-40b9-891f-7366c2ce4ed2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_11449c12-c935-4656-b09f-9856639336fc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0fd8113f-82b9-47b6-b61e-f7ab3681c8c9" xlink:to="loc_srt_WeightedAverageMember_11449c12-c935-4656-b09f-9856639336fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_23fdfa59-2ebb-409b-b181-b2f6fe6f9a87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_d09a4931-a58d-4e04-9c19-faad0c7392c9" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_23fdfa59-2ebb-409b-b181-b2f6fe6f9a87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_23fdfa59-2ebb-409b-b181-b2f6fe6f9a87_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_23fdfa59-2ebb-409b-b181-b2f6fe6f9a87" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_23fdfa59-2ebb-409b-b181-b2f6fe6f9a87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_1fd2f060-172d-4b53-baf7-def380834291" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_23fdfa59-2ebb-409b-b181-b2f6fe6f9a87" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_1fd2f060-172d-4b53-baf7-def380834291" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_c62173e8-af4e-4e91-a18b-49304712ee87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1fd2f060-172d-4b53-baf7-def380834291" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_c62173e8-af4e-4e91-a18b-49304712ee87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_MeasurementInputProgramProfitabilityMember_597d7a4e-f3c7-45a6-be10-44946c5628c8" xlink:href="afrm-20220630.xsd#afrm_MeasurementInputProgramProfitabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_1fd2f060-172d-4b53-baf7-def380834291" xlink:to="loc_afrm_MeasurementInputProgramProfitabilityMember_597d7a4e-f3c7-45a6-be10-44946c5628c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_835cfe88-5bf7-4c3e-a442-9b0481f15e85" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_d09a4931-a58d-4e04-9c19-faad0c7392c9" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_835cfe88-5bf7-4c3e-a442-9b0481f15e85" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_835cfe88-5bf7-4c3e-a442-9b0481f15e85_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_835cfe88-5bf7-4c3e-a442-9b0481f15e85" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_835cfe88-5bf7-4c3e-a442-9b0481f15e85_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_28a3eb42-69de-4441-8e09-3dff098fc0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_835cfe88-5bf7-4c3e-a442-9b0481f15e85" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_28a3eb42-69de-4441-8e09-3dff098fc0d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementProfitShareLiabilityMember_6ca62e0c-692a-467f-b320-94e4f85ddccb" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementProfitShareLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_28a3eb42-69de-4441-8e09-3dff098fc0d0" xlink:to="loc_afrm_CommercialAgreementProfitShareLiabilityMember_6ca62e0c-692a-467f-b320-94e4f85ddccb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFinancialAssetsandLiabilitiesNotRecordedatFairValueDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#FairValueofFinancialAssetsandLiabilitiesFinancialAssetsandLiabilitiesNotRecordedatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/FairValueofFinancialAssetsandLiabilitiesFinancialAssetsandLiabilitiesNotRecordedatFairValueDetails" xlink:type="extended" id="i88b87a267768437d910f5ed43a9062f9_FairValueofFinancialAssetsandLiabilitiesFinancialAssetsandLiabilitiesNotRecordedatFairValueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableHeldForSaleFairValueDisclosure_ac7f77b1-0206-478b-b1e4-ce9dafa63e83" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableHeldForSaleFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_afrm_FinancingReceivableHeldForSaleFairValueDisclosure_ac7f77b1-0206-478b-b1e4-ce9dafa63e83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FinancingReceivableFairValueDisclosure_e1d03870-4e3f-4b1f-beec-6645880cc88d" xlink:href="afrm-20220630.xsd#afrm_FinancingReceivableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_afrm_FinancingReceivableFairValueDisclosure_e1d03870-4e3f-4b1f-beec-6645880cc88d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_91eb06d9-c3b5-49e6-8a95-0c3978a7307b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_91eb06d9-c3b5-49e6-8a95-0c3978a7307b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableFairValueDisclosure_a19fb1ed-e163-4f25-b90b-474e14a9526d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_AccountsReceivableFairValueDisclosure_a19fb1ed-e163-4f25-b90b-474e14a9526d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_5dbdb560-6a9e-45e4-81b6-d45b3b39318b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_5dbdb560-6a9e-45e4-81b6-d45b3b39318b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_525eed12-e605-493c-b88b-50ea4bc4eaf5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_525eed12-e605-493c-b88b-50ea4bc4eaf5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableFairValueDisclosure_1fc6f7db-1abf-4898-96b9-d44e2b9e3445" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NotesPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_NotesPayableFairValueDisclosure_1fc6f7db-1abf-4898-96b9-d44e2b9e3445" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditFairValueDisclosure_78f79d0a-8c23-4d60-a421-d3ffc67fac99" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LinesOfCreditFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_LinesOfCreditFairValueDisclosure_78f79d0a-8c23-4d60-a421-d3ffc67fac99" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableFairValueDisclosure_23524c4e-b0b4-4ead-886a-eb86d252ffba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_AccountsPayableFairValueDisclosure_23524c4e-b0b4-4ead-886a-eb86d252ffba" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableFairValueDisclosure_9d3aaf02-7beb-425a-936e-96e9b9df98dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LoansPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_LoansPayableFairValueDisclosure_9d3aaf02-7beb-425a-936e-96e9b9df98dc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_InterestPayableFairValueDisclosure_27bb065e-4572-455c-b0ba-f54155fed413" xlink:href="afrm-20220630.xsd#afrm_InterestPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_afrm_InterestPayableFairValueDisclosure_27bb065e-4572-455c-b0ba-f54155fed413" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AccruedLiabilitiesAndOtherLiabilitiesFairValueDisclosure_0c3040d7-7c5f-47f0-a339-5e20ab04ec25" xlink:href="afrm-20220630.xsd#afrm_AccruedLiabilitiesAndOtherLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_afrm_AccruedLiabilitiesAndOtherLiabilitiesFairValueDisclosure_0c3040d7-7c5f-47f0-a339-5e20ab04ec25" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_6054836b-e935-4ee9-a3ec-f3cc7e38d73f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_6054836b-e935-4ee9-a3ec-f3cc7e38d73f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_dcc02454-8f32-4089-b131-84292c9b0519" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_dcc02454-8f32-4089-b131-84292c9b0519" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_b0156517-997f-4f8f-b580-1b3dc09ae2a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_70e19697-e920-4534-8033-17c7a02ee3ff" xlink:to="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_b0156517-997f-4f8f-b580-1b3dc09ae2a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_9b415c65-f3f8-4a8e-9267-3d94fcdc0488" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_b0156517-997f-4f8f-b580-1b3dc09ae2a5" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_9b415c65-f3f8-4a8e-9267-3d94fcdc0488" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_9b415c65-f3f8-4a8e-9267-3d94fcdc0488_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_9b415c65-f3f8-4a8e-9267-3d94fcdc0488" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_9b415c65-f3f8-4a8e-9267-3d94fcdc0488_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec999f95-fad0-48aa-aa47-95556bef6fd4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_9b415c65-f3f8-4a8e-9267-3d94fcdc0488" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec999f95-fad0-48aa-aa47-95556bef6fd4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_396604aa-9fe6-4380-99a0-273ba2796397" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec999f95-fad0-48aa-aa47-95556bef6fd4" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_396604aa-9fe6-4380-99a0-273ba2796397" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_015745a5-8d5b-4152-b448-2eaf85698ebf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec999f95-fad0-48aa-aa47-95556bef6fd4" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_015745a5-8d5b-4152-b448-2eaf85698ebf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_5f1d4c1e-aa2c-46a3-8661-72fe5bc3d5b6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec999f95-fad0-48aa-aa47-95556bef6fd4" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_5f1d4c1e-aa2c-46a3-8661-72fe5bc3d5b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_74c5992e-4495-486e-ba27-898e785781bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_b0156517-997f-4f8f-b580-1b3dc09ae2a5" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_74c5992e-4495-486e-ba27-898e785781bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_74c5992e-4495-486e-ba27-898e785781bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_74c5992e-4495-486e-ba27-898e785781bd" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_74c5992e-4495-486e-ba27-898e785781bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b68014ec-abe5-4939-84da-ece039657ff4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_74c5992e-4495-486e-ba27-898e785781bd" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b68014ec-abe5-4939-84da-ece039657ff4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_7c3001c0-ca05-46d8-a9bd-18571d26a6b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b68014ec-abe5-4939-84da-ece039657ff4" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_7c3001c0-ca05-46d8-a9bd-18571d26a6b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_e427f21a-e406-4cbc-a924-a67e696008ce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b68014ec-abe5-4939-84da-ece039657ff4" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_e427f21a-e406-4cbc-a924-a67e696008ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_cf3d7b6b-705c-4d66-98a5-16ae1dc8d5de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b68014ec-abe5-4939-84da-ece039657ff4" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_cf3d7b6b-705c-4d66-98a5-16ae1dc8d5de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_0a7f82cf-6b67-4a5b-8727-e8399b382368" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_b0156517-997f-4f8f-b580-1b3dc09ae2a5" xlink:to="loc_us-gaap_CreditFacilityAxis_0a7f82cf-6b67-4a5b-8727-e8399b382368" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_0a7f82cf-6b67-4a5b-8727-e8399b382368_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_0a7f82cf-6b67-4a5b-8727-e8399b382368" xlink:to="loc_us-gaap_CreditFacilityDomain_0a7f82cf-6b67-4a5b-8727-e8399b382368_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_9ccfb9b5-7471-4a94-9f92-ff1f8f20a655" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_0a7f82cf-6b67-4a5b-8727-e8399b382368" xlink:to="loc_us-gaap_CreditFacilityDomain_9ccfb9b5-7471-4a94-9f92-ff1f8f20a655" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_b267ef6a-07f4-4088-a8e0-290eb8394b98" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9ccfb9b5-7471-4a94-9f92-ff1f8f20a655" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_b267ef6a-07f4-4088-a8e0-290eb8394b98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_94f267b9-3818-4c32-a3e6-92827bb78145" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_b0156517-997f-4f8f-b580-1b3dc09ae2a5" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_94f267b9-3818-4c32-a3e6-92827bb78145" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_94f267b9-3818-4c32-a3e6-92827bb78145_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_94f267b9-3818-4c32-a3e6-92827bb78145" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_94f267b9-3818-4c32-a3e6-92827bb78145_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0a7fc302-e9a8-4acf-bf90-35535334db94" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_94f267b9-3818-4c32-a3e6-92827bb78145" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0a7fc302-e9a8-4acf-bf90-35535334db94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_64df6cdf-1049-401d-a897-8916d932ef3f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_0a7fc302-e9a8-4acf-bf90-35535334db94" xlink:to="loc_us-gaap_LineOfCreditMember_64df6cdf-1049-401d-a897-8916d932ef3f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/RedeemableConvertiblePreferredStockandStockholdersDeficitAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#RedeemableConvertiblePreferredStockandStockholdersDeficitAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/RedeemableConvertiblePreferredStockandStockholdersDeficitAdditionalInformationDetails" xlink:type="extended" id="i80b33a083fb54d6bbea5435de5116184_RedeemableConvertiblePreferredStockandStockholdersDeficitAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodNewIssuesShares_a9ca6bbb-8e3d-495a-8cc7-86ec5a99ecda" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodNewIssuesShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodNewIssuesShares_a9ca6bbb-8e3d-495a-8cc7-86ec5a99ecda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodNewIssuesPricePerShare_fd2178d5-5853-4560-a4b4-a1c55e35f8c4" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodNewIssuesPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodNewIssuesPricePerShare_fd2178d5-5853-4560-a4b4-a1c55e35f8c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_b3533bdc-d6ea-4fd4-94d5-427cf9843b85" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_b3533bdc-d6ea-4fd4-94d5-427cf9843b85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLiquidationPreference_ea6d1128-757c-4694-b51a-0f1b336ffcec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityLiquidationPreference"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_TemporaryEquityLiquidationPreference_ea6d1128-757c-4694-b51a-0f1b336ffcec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_3c534c83-4d1e-4615-9c14-cfeae314ce8e" xlink:href="afrm-20220630.xsd#afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_3c534c83-4d1e-4615-9c14-cfeae314ce8e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_da75bff0-4da1-4a65-bf11-4d31ac898b97" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_da75bff0-4da1-4a65-bf11-4d31ac898b97" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_44004aff-28ca-4803-be1a-059ed12dd492" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_44004aff-28ca-4803-be1a-059ed12dd492" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_d2598852-8e51-4da0-8d18-f257fc4e0465" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_d2598852-8e51-4da0-8d18-f257fc4e0465" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommonStockVotingRightsNumberOfVotesPerShare_dd7b8cb6-0f88-44e0-88e4-6fc2eab4be7d" xlink:href="afrm-20220630.xsd#afrm_CommonStockVotingRightsNumberOfVotesPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_CommonStockVotingRightsNumberOfVotesPerShare_dd7b8cb6-0f88-44e0-88e4-6fc2eab4be7d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantsOrRightsGrantedCommonSharesPurchased_e352c020-0dc8-42d8-b765-b9d316282c81" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantsOrRightsGrantedCommonSharesPurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantsOrRightsGrantedCommonSharesPurchased_e352c020-0dc8-42d8-b765-b9d316282c81" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_96063ff3-bfb2-42b7-9525-fe432f43f060" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_96063ff3-bfb2-42b7-9525-fe432f43f060" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_7cee0c62-c85e-4fa9-bcb8-2d8ee07b3c70" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_7cee0c62-c85e-4fa9-bcb8-2d8ee07b3c70" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantsOrRightsExerciseTerm_396df2df-998b-47b0-9dcd-c72578b369ac" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantsOrRightsExerciseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantsOrRightsExerciseTerm_396df2df-998b-47b0-9dcd-c72578b369ac" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantsOrRightsDividendYield_55c6dee4-2e70-41e8-8398-9644cd0a1cc6" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantsOrRightsDividendYield"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantsOrRightsDividendYield_55c6dee4-2e70-41e8-8398-9644cd0a1cc6" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantsOrRightsVolatility_1a0426f6-9cf1-44c2-81c4-5f36a7ea797e" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantsOrRightsVolatility"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantsOrRightsVolatility_1a0426f6-9cf1-44c2-81c4-5f36a7ea797e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOrWarrantsOrRightsRiskFreeRate_3017d811-81ac-4967-839e-c728d3218242" xlink:href="afrm-20220630.xsd#afrm_ClassOrWarrantsOrRightsRiskFreeRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOrWarrantsOrRightsRiskFreeRate_3017d811-81ac-4967-839e-c728d3218242" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_WarrantsExercisedUponVesting_9661b33d-3814-4684-9821-74c1d86f48cd" xlink:href="afrm-20220630.xsd#afrm_WarrantsExercisedUponVesting"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_WarrantsExercisedUponVesting_9661b33d-3814-4684-9821-74c1d86f48cd" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOrWarrantsOrRightsSaleOrWarrantsRecognized_ba5ad111-7fcc-4c99-bf97-ca7d7091baa7" xlink:href="afrm-20220630.xsd#afrm_ClassOrWarrantsOrRightsSaleOrWarrantsRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOrWarrantsOrRightsSaleOrWarrantsRecognized_ba5ad111-7fcc-4c99-bf97-ca7d7091baa7" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantsOrRightsAmortizationExpense_5fbd9745-887d-42ee-a677-12d438dfc3de" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantsOrRightsAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantsOrRightsAmortizationExpense_5fbd9745-887d-42ee-a677-12d438dfc3de" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantsOrRightsExpensesOnGrantDateFairValueOnSaleOfWarrants_b68b47bd-c5c1-4c60-bacb-09b685913ec1" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantsOrRightsExpensesOnGrantDateFairValueOnSaleOfWarrants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantsOrRightsExpensesOnGrantDateFairValueOnSaleOfWarrants_b68b47bd-c5c1-4c60-bacb-09b685913ec1" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_e0b47e40-f3a3-473e-8910-d233589e63ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_e0b47e40-f3a3-473e-8910-d233589e63ba" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_fb2cf6a2-3052-4805-9f56-1c5c1e38d66b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_fb2cf6a2-3052-4805-9f56-1c5c1e38d66b" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetGross_7ec9dfd4-96bc-4295-91e7-5ae262923be4" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_CommercialAgreementAssetGross_7ec9dfd4-96bc-4295-91e7-5ae262923be4" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_StockGrantedDuringPeriodSharesWarrantsGrantedWeightedAverageGrantDateFairValue_61732e8d-9e31-40ba-938b-8c00b7978fb1" xlink:href="afrm-20220630.xsd#afrm_StockGrantedDuringPeriodSharesWarrantsGrantedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_StockGrantedDuringPeriodSharesWarrantsGrantedWeightedAverageGrantDateFairValue_61732e8d-9e31-40ba-938b-8c00b7978fb1" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantOrRightOutstandingWeightedAverageGrantDateFairValue_b7f3fd40-611a-4bba-9bf2-eab5495f61f0" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantOrRightOutstandingWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantOrRightOutstandingWeightedAverageGrantDateFairValue_b7f3fd40-611a-4bba-9bf2-eab5495f61f0" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ClassOfWarrantOrRightExercisableWeightedAverageGrantDateFairValue_8cc5c2cf-236f-4d4f-bbd7-455b2314969d" xlink:href="afrm-20220630.xsd#afrm_ClassOfWarrantOrRightExercisableWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_afrm_ClassOfWarrantOrRightExercisableWeightedAverageGrantDateFairValue_8cc5c2cf-236f-4d4f-bbd7-455b2314969d" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityByClassOfStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TemporaryEquityLineItems_b646110d-58cc-4690-8254-3515a5a3eba6" xlink:to="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_d09235fc-0a99-4908-bd9a-214b768ffd20" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:to="loc_us-gaap_StatementClassOfStockAxis_d09235fc-0a99-4908-bd9a-214b768ffd20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_d09235fc-0a99-4908-bd9a-214b768ffd20_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d09235fc-0a99-4908-bd9a-214b768ffd20" xlink:to="loc_us-gaap_ClassOfStockDomain_d09235fc-0a99-4908-bd9a-214b768ffd20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d09235fc-0a99-4908-bd9a-214b768ffd20" xlink:to="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesGPreferredStockMember_d9574647-edfa-458c-9147-84a6ee9a0dff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeriesGPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:to="loc_us-gaap_SeriesGPreferredStockMember_d9574647-edfa-458c-9147-84a6ee9a0dff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SeriesG1PreferredStockMember_6c1e6d61-372e-4e65-8663-aa3b47979046" xlink:href="afrm-20220630.xsd#afrm_SeriesG1PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:to="loc_afrm_SeriesG1PreferredStockMember_6c1e6d61-372e-4e65-8663-aa3b47979046" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_ce9da549-8c4c-483f-a22f-94a93e450492" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_ce9da549-8c4c-483f-a22f-94a93e450492" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_70610f05-dd4b-46ed-8095-fcfd23939988" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:to="loc_us-gaap_CommonClassAMember_70610f05-dd4b-46ed-8095-fcfd23939988" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_55c6b6da-1b7f-41c0-9e53-0d7a00d070f9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2135554d-4ee5-4760-898d-4c1a2ecae68f" xlink:to="loc_us-gaap_CommonClassBMember_55c6b6da-1b7f-41c0-9e53-0d7a00d070f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_00308827-61d1-4970-9fb3-8742004f4b73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_00308827-61d1-4970-9fb3-8742004f4b73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_00308827-61d1-4970-9fb3-8742004f4b73_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_00308827-61d1-4970-9fb3-8742004f4b73" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_00308827-61d1-4970-9fb3-8742004f4b73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_6dbe0c0b-3241-4c08-8ca2-790fb53e4fba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_00308827-61d1-4970-9fb3-8742004f4b73" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_6dbe0c0b-3241-4c08-8ca2-790fb53e4fba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_FirstWarrantSharesMember_972194ae-3b65-4767-ae1b-9c906e59faaf" xlink:href="afrm-20220630.xsd#afrm_FirstWarrantSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_6dbe0c0b-3241-4c08-8ca2-790fb53e4fba" xlink:to="loc_afrm_FirstWarrantSharesMember_972194ae-3b65-4767-ae1b-9c906e59faaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_SecondWarrantSharesMember_0d75a6e7-b5a8-431d-a5d5-ac2d2e18dab4" xlink:href="afrm-20220630.xsd#afrm_SecondWarrantSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_6dbe0c0b-3241-4c08-8ca2-790fb53e4fba" xlink:to="loc_afrm_SecondWarrantSharesMember_0d75a6e7-b5a8-431d-a5d5-ac2d2e18dab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_bfa228e1-7677-4f2a-bf6c-e48475d1bec1" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:to="loc_srt_RangeAxis_bfa228e1-7677-4f2a-bf6c-e48475d1bec1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_bfa228e1-7677-4f2a-bf6c-e48475d1bec1_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_bfa228e1-7677-4f2a-bf6c-e48475d1bec1" xlink:to="loc_srt_RangeMember_bfa228e1-7677-4f2a-bf6c-e48475d1bec1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c8847e23-44be-47b2-bc16-5e10ea272138" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_bfa228e1-7677-4f2a-bf6c-e48475d1bec1" xlink:to="loc_srt_RangeMember_c8847e23-44be-47b2-bc16-5e10ea272138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a6b7b865-2f8a-4f7f-a276-352fcfdff1f9" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c8847e23-44be-47b2-bc16-5e10ea272138" xlink:to="loc_srt_MinimumMember_a6b7b865-2f8a-4f7f-a276-352fcfdff1f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a6c1c500-2a32-4179-ba90-a8c56753293c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c8847e23-44be-47b2-bc16-5e10ea272138" xlink:to="loc_srt_MaximumMember_a6c1c500-2a32-4179-ba90-a8c56753293c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_b890343a-9433-4faa-b6ce-ce5a404df250" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_b890343a-9433-4faa-b6ce-ce5a404df250" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_b890343a-9433-4faa-b6ce-ce5a404df250_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_b890343a-9433-4faa-b6ce-ce5a404df250" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_b890343a-9433-4faa-b6ce-ce5a404df250_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_6e02f498-f92b-439a-89a2-540413d6b972" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_b890343a-9433-4faa-b6ce-ce5a404df250" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_6e02f498-f92b-439a-89a2-540413d6b972" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedDividendRateMember_0451ff4c-524c-420a-8b08-7e7640d7995d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputExpectedDividendRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_6e02f498-f92b-439a-89a2-540413d6b972" xlink:to="loc_us-gaap_MeasurementInputExpectedDividendRateMember_0451ff4c-524c-420a-8b08-7e7640d7995d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember_788e1460-0f6a-4ba3-b6c8-7e8aaf31ca9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_6e02f498-f92b-439a-89a2-540413d6b972" xlink:to="loc_us-gaap_MeasurementInputExpectedTermMember_788e1460-0f6a-4ba3-b6c8-7e8aaf31ca9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPriceVolatilityMember_58d5ece5-219a-41aa-bd71-8d6280e3c951" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPriceVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_6e02f498-f92b-439a-89a2-540413d6b972" xlink:to="loc_us-gaap_MeasurementInputPriceVolatilityMember_58d5ece5-219a-41aa-bd71-8d6280e3c951" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_686ac46d-5f33-4087-9ec4-cd891f8f36f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_6e02f498-f92b-439a-89a2-540413d6b972" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_686ac46d-5f33-4087-9ec4-cd891f8f36f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetTypeAxis_8b274896-c07d-4e94-bba5-e19b4b32b514" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_f9057b48-5871-4ca1-8923-ee7b59d5b049" xlink:to="loc_afrm_CommercialAgreementAssetTypeAxis_8b274896-c07d-4e94-bba5-e19b4b32b514" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetTypeDomain_8b274896-c07d-4e94-bba5-e19b4b32b514_default" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_afrm_CommercialAgreementAssetTypeAxis_8b274896-c07d-4e94-bba5-e19b4b32b514" xlink:to="loc_afrm_CommercialAgreementAssetTypeDomain_8b274896-c07d-4e94-bba5-e19b4b32b514_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetTypeDomain_cc954e0b-fa2c-40e0-b1ce-4dbc9d48ba53" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_afrm_CommercialAgreementAssetTypeAxis_8b274896-c07d-4e94-bba5-e19b4b32b514" xlink:to="loc_afrm_CommercialAgreementAssetTypeDomain_cc954e0b-fa2c-40e0-b1ce-4dbc9d48ba53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_CommercialAgreementAssetShopifyIncWarrantsMember_12830383-0436-44c0-94ee-8985c3f2c9aa" xlink:href="afrm-20220630.xsd#afrm_CommercialAgreementAssetShopifyIncWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_afrm_CommercialAgreementAssetTypeDomain_cc954e0b-fa2c-40e0-b1ce-4dbc9d48ba53" xlink:to="loc_afrm_CommercialAgreementAssetShopifyIncWarrantsMember_12830383-0436-44c0-94ee-8985c3f2c9aa" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/RedeemableConvertiblePreferredStockandStockholdersDeficitCommonStockReservedforIssuanceDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#RedeemableConvertiblePreferredStockandStockholdersDeficitCommonStockReservedforIssuanceDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/RedeemableConvertiblePreferredStockandStockholdersDeficitCommonStockReservedforIssuanceDetails" xlink:type="extended" id="id6e844b69bfe4cad9e8194f93a436043_RedeemableConvertiblePreferredStockandStockholdersDeficitCommonStockReservedforIssuanceDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_9387f39d-57f0-4bd5-9f5b-a5f4ed3cceb2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_f084083e-63e1-4595-b4d9-cceeeb794329" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_9387f39d-57f0-4bd5-9f5b-a5f4ed3cceb2" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_f084083e-63e1-4595-b4d9-cceeeb794329" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_a2ee557e-1b7e-49a0-962c-e38e1e2b209e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_9387f39d-57f0-4bd5-9f5b-a5f4ed3cceb2" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_a2ee557e-1b7e-49a0-962c-e38e1e2b209e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_db27a35c-4e2b-4811-8224-04f5af941ad5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_a2ee557e-1b7e-49a0-962c-e38e1e2b209e" xlink:to="loc_us-gaap_AwardTypeAxis_db27a35c-4e2b-4811-8224-04f5af941ad5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_db27a35c-4e2b-4811-8224-04f5af941ad5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_db27a35c-4e2b-4811-8224-04f5af941ad5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_db27a35c-4e2b-4811-8224-04f5af941ad5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_95109540-5e0a-43d5-86b1-20ee84dea39a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_db27a35c-4e2b-4811-8224-04f5af941ad5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_95109540-5e0a-43d5-86b1-20ee84dea39a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_bf077386-d978-4b5f-b196-072ac34149e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_95109540-5e0a-43d5-86b1-20ee84dea39a" xlink:to="loc_us-gaap_EmployeeStockOptionMember_bf077386-d978-4b5f-b196-072ac34149e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentAgreementOptionFutureGrantMember_7882e786-350d-40ab-875b-fe0b2b420589" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentAgreementOptionFutureGrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_95109540-5e0a-43d5-86b1-20ee84dea39a" xlink:to="loc_afrm_ShareBasedPaymentAgreementOptionFutureGrantMember_7882e786-350d-40ab-875b-fe0b2b420589" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/EquityIncentivePlansAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#EquityIncentivePlansAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/EquityIncentivePlansAdditionalInformationDetails" xlink:type="extended" id="i47648c65f0f84300a65c490de5b6b51f_EquityIncentivePlansAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_10183536-9331-47db-8f5c-b9c5fa9f8592" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_10183536-9331-47db-8f5c-b9c5fa9f8592" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_a8b689d9-98a4-41d5-a305-1b5ccaa076d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_a8b689d9-98a4-41d5-a305-1b5ccaa076d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriodPriorToIPO_b5722b56-7cf3-4ce5-834e-6296d61e9f7f" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriodPriorToIPO"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriodPriorToIPO_b5722b56-7cf3-4ce5-834e-6296d61e9f7f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b834d810-414a-45f2-b420-8dbb1fbbae3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b834d810-414a-45f2-b420-8dbb1fbbae3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_615387f9-7c6d-4ec7-b6a4-ba5bf647db8a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_615387f9-7c6d-4ec7-b6a4-ba5bf647db8a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_94b88e28-844c-4b75-a2f4-318a986443cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_94b88e28-844c-4b75-a2f4-318a986443cf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3a3a3d86-a52d-4b86-b216-5e3f87b59956" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3a3a3d86-a52d-4b86-b216-5e3f87b59956" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_9136f08d-1630-42ee-a61d-9d11cbc84b07" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_9136f08d-1630-42ee-a61d-9d11cbc84b07" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_9f2f80d1-1df3-4160-9693-c804c5101aa2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_9f2f80d1-1df3-4160-9693-c804c5101aa2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_27a795ee-5083-4c25-85e5-8f193676d32e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_27a795ee-5083-4c25-85e5-8f193676d32e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_cc58b5fd-c183-463a-88fc-88014de9f30e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_cc58b5fd-c183-463a-88fc-88014de9f30e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExerciseTaxesPayable_bb7dd5a5-ccb3-42e3-b199-ad114a57ed0f" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExerciseTaxesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardExerciseTaxesPayable_bb7dd5a5-ccb3-42e3-b199-ad114a57ed0f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExerciseRightsLiability_e4c36f24-9991-42b7-8fb3-5272d74a7cd3" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExerciseRightsLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsEarlyExerciseRightsLiability_e4c36f24-9991-42b7-8fb3-5272d74a7cd3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_70f4ec3f-c9a9-463b-a89b-c889d98bb311" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_70f4ec3f-c9a9-463b-a89b-c889d98bb311" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_NumberOfTranches_90922ae6-0171-471a-bec0-9db3406e3ff7" xlink:href="afrm-20220630.xsd#afrm_NumberOfTranches"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_NumberOfTranches_90922ae6-0171-471a-bec0-9db3406e3ff7" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardAverageTradingDayVolume_bfc48c49-9dc9-4349-a449-303eb81c47c7" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardAverageTradingDayVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardAverageTradingDayVolume_bfc48c49-9dc9-4349-a449-303eb81c47c7" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_649faf43-d570-401b-891a-5a5b667b2bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_649faf43-d570-401b-891a-5a5b667b2bf5" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_da42a18b-a351-41d9-9950-17cc6a5c6a4a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_da42a18b-a351-41d9-9950-17cc6a5c6a4a" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_3892b336-1e8a-49ed-ae8f-8e725fc554be" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_3892b336-1e8a-49ed-ae8f-8e725fc554be" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_0861b199-4735-4611-94e3-b62a39a044f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_0861b199-4735-4611-94e3-b62a39a044f7" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingConditions_d75aed12-51eb-4a8a-b391-f27dc1a4521a" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingConditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingConditions_d75aed12-51eb-4a8a-b391-f27dc1a4521a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_c483d5cb-d576-4a88-be41-ad727c6c37b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_c483d5cb-d576-4a88-be41-ad727c6c37b7" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_44074f3f-5e04-46b1-a7c1-2a328d78ed9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_44074f3f-5e04-46b1-a7c1-2a328d78ed9d" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_7c83f319-e93f-46d8-a284-73920fb6fd65" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_7c83f319-e93f-46d8-a284-73920fb6fd65" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharePurchasePriceDiscountPercent_40028337-bf8c-4644-ac4c-e719be576598" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharePurchasePriceDiscountPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharePurchasePriceDiscountPercent_40028337-bf8c-4644-ac4c-e719be576598" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_f8ff324d-6143-4545-8e27-1b965bf8f137" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_f8ff324d-6143-4545-8e27-1b965bf8f137" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_8b66158f-9ce3-461e-b65a-4583172dff08" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_8b66158f-9ce3-461e-b65a-4583172dff08" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_fb81092b-6f95-446a-993f-72682a9c4dca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_fb81092b-6f95-446a-993f-72682a9c4dca" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesContingentConsideration_2c80392c-64d9-4561-84d0-c3a8fafa2eb3" xlink:href="afrm-20220630.xsd#afrm_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_afrm_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesContingentConsideration_2c80392c-64d9-4561-84d0-c3a8fafa2eb3" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4039361e-1960-409c-b8c3-76e41099ab89" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_ba13e57d-b021-4f3a-b680-8ff6a15df743" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:to="loc_us-gaap_PlanNameAxis_ba13e57d-b021-4f3a-b680-8ff6a15df743" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_ba13e57d-b021-4f3a-b680-8ff6a15df743_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_ba13e57d-b021-4f3a-b680-8ff6a15df743" xlink:to="loc_us-gaap_PlanNameDomain_ba13e57d-b021-4f3a-b680-8ff6a15df743_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c0cbb502-299b-4aad-92ce-f16e19e730dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_ba13e57d-b021-4f3a-b680-8ff6a15df743" xlink:to="loc_us-gaap_PlanNameDomain_c0cbb502-299b-4aad-92ce-f16e19e730dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_AmendedAndRestated2012StockPlanMember_8e04080f-1930-454a-a88d-10472360aaae" xlink:href="afrm-20220630.xsd#afrm_AmendedAndRestated2012StockPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_c0cbb502-299b-4aad-92ce-f16e19e730dd" xlink:to="loc_afrm_AmendedAndRestated2012StockPlanMember_8e04080f-1930-454a-a88d-10472360aaae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_A2020EmployeeStockPurchasePlanMember_7afb3d16-e525-4bd5-8744-2edd5ddd744e" xlink:href="afrm-20220630.xsd#afrm_A2020EmployeeStockPurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_c0cbb502-299b-4aad-92ce-f16e19e730dd" xlink:to="loc_afrm_A2020EmployeeStockPurchasePlanMember_7afb3d16-e525-4bd5-8744-2edd5ddd744e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_cee665fe-d544-4d65-a108-65e0246e062f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:to="loc_us-gaap_AwardTypeAxis_cee665fe-d544-4d65-a108-65e0246e062f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cee665fe-d544-4d65-a108-65e0246e062f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_cee665fe-d544-4d65-a108-65e0246e062f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cee665fe-d544-4d65-a108-65e0246e062f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4edee7ae-2447-4d70-aa73-66aedb624e12" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_cee665fe-d544-4d65-a108-65e0246e062f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4edee7ae-2447-4d70-aa73-66aedb624e12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_aa37a0cd-ca9e-4ce5-a298-b8a29b740641" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4edee7ae-2447-4d70-aa73-66aedb624e12" xlink:to="loc_us-gaap_EmployeeStockOptionMember_aa37a0cd-ca9e-4ce5-a298-b8a29b740641" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PerformanceBasedStockOptionsMember_ecad4444-fcf8-46ee-a5b7-f3e0221f2194" xlink:href="afrm-20220630.xsd#afrm_PerformanceBasedStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4edee7ae-2447-4d70-aa73-66aedb624e12" xlink:to="loc_afrm_PerformanceBasedStockOptionsMember_ecad4444-fcf8-46ee-a5b7-f3e0221f2194" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_6a1b557a-61dd-425f-a341-e88d4b5df61d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4edee7ae-2447-4d70-aa73-66aedb624e12" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_6a1b557a-61dd-425f-a341-e88d4b5df61d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1b6f6dbc-1e5d-45dc-b323-b9c02a7dd128" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:to="loc_srt_RangeAxis_1b6f6dbc-1e5d-45dc-b323-b9c02a7dd128" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1b6f6dbc-1e5d-45dc-b323-b9c02a7dd128_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1b6f6dbc-1e5d-45dc-b323-b9c02a7dd128" xlink:to="loc_srt_RangeMember_1b6f6dbc-1e5d-45dc-b323-b9c02a7dd128_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_eb27f56a-0656-4798-8781-a5b4b321c5be" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1b6f6dbc-1e5d-45dc-b323-b9c02a7dd128" xlink:to="loc_srt_RangeMember_eb27f56a-0656-4798-8781-a5b4b321c5be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_765db498-c130-4d4d-b220-0a85a7bafe65" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_eb27f56a-0656-4798-8781-a5b4b321c5be" xlink:to="loc_srt_MinimumMember_765db498-c130-4d4d-b220-0a85a7bafe65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_15e346fb-d201-49ce-8423-e0c014db9730" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_eb27f56a-0656-4798-8781-a5b4b321c5be" xlink:to="loc_srt_MaximumMember_15e346fb-d201-49ce-8423-e0c014db9730" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_902195c2-77e7-48fb-9b34-3bd32657ac0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_902195c2-77e7-48fb-9b34-3bd32657ac0a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_902195c2-77e7-48fb-9b34-3bd32657ac0a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_902195c2-77e7-48fb-9b34-3bd32657ac0a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_902195c2-77e7-48fb-9b34-3bd32657ac0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8ea82c19-7f39-4e1a-9535-f009e70dc900" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_902195c2-77e7-48fb-9b34-3bd32657ac0a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8ea82c19-7f39-4e1a-9535-f009e70dc900" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ReturnlyTechnologiesIncMember_fd54a4ec-5761-4fff-841f-564d424d6448" xlink:href="afrm-20220630.xsd#afrm_ReturnlyTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8ea82c19-7f39-4e1a-9535-f009e70dc900" xlink:to="loc_afrm_ReturnlyTechnologiesIncMember_fd54a4ec-5761-4fff-841f-564d424d6448" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_fc649495-93a4-430a-8fc6-a3f333cf4fbc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:to="loc_us-gaap_VestingAxis_fc649495-93a4-430a-8fc6-a3f333cf4fbc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_fc649495-93a4-430a-8fc6-a3f333cf4fbc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_fc649495-93a4-430a-8fc6-a3f333cf4fbc" xlink:to="loc_us-gaap_VestingDomain_fc649495-93a4-430a-8fc6-a3f333cf4fbc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_fc649495-93a4-430a-8fc6-a3f333cf4fbc" xlink:to="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_86122eb4-8ed2-4180-8638-28b388047c04" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_86122eb4-8ed2-4180-8638-28b388047c04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_93fef528-6ebc-4976-aefd-7cb918ccbb9a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_93fef528-6ebc-4976-aefd-7cb918ccbb9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_e591f28b-b2e5-4124-97f7-ca84aac1f9bf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_e591f28b-b2e5-4124-97f7-ca84aac1f9bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheFourMember_959c2ada-ff66-44f6-b454-f8d49078edce" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheFourMember_959c2ada-ff66-44f6-b454-f8d49078edce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheFiveMember_27b0a135-3976-4054-a4de-1b852a3087fd" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_5a44660e-86b2-4396-b93a-46c24c123189" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheFiveMember_27b0a135-3976-4054-a4de-1b852a3087fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_ff80a941-e06d-468f-9e7a-1e42f5e8d102" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8a569c05-fc39-4558-b27d-c9ff3bc81f21" xlink:to="loc_us-gaap_StatementClassOfStockAxis_ff80a941-e06d-468f-9e7a-1e42f5e8d102" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_ff80a941-e06d-468f-9e7a-1e42f5e8d102_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_ff80a941-e06d-468f-9e7a-1e42f5e8d102" xlink:to="loc_us-gaap_ClassOfStockDomain_ff80a941-e06d-468f-9e7a-1e42f5e8d102_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_609db82b-ca26-4ad5-8a5b-9ad2fa91ba94" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_ff80a941-e06d-468f-9e7a-1e42f5e8d102" xlink:to="loc_us-gaap_ClassOfStockDomain_609db82b-ca26-4ad5-8a5b-9ad2fa91ba94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_bcb80733-2062-4e85-99fb-92e233d3a866" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_609db82b-ca26-4ad5-8a5b-9ad2fa91ba94" xlink:to="loc_us-gaap_CommonClassAMember_bcb80733-2062-4e85-99fb-92e233d3a866" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/EquityIncentivePlansFairValueAssumptionsDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#EquityIncentivePlansFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/EquityIncentivePlansFairValueAssumptionsDetails" xlink:type="extended" id="idb856108f6fe4d5c86ea945dcb1ef45c_EquityIncentivePlansFairValueAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_9b75a443-0795-460a-bae6-465183684cfe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_9b75a443-0795-460a-bae6-465183684cfe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_efbbf7e1-bf3c-49f6-a21e-aac074c70106" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_efbbf7e1-bf3c-49f6-a21e-aac074c70106" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_1f0ab5ac-335b-46c4-b67b-a5189c33ff9b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_1f0ab5ac-335b-46c4-b67b-a5189c33ff9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_270cea4e-2100-4368-b6d9-5b7ae2b7f36d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_270cea4e-2100-4368-b6d9-5b7ae2b7f36d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1d664f11-2b02-4372-afb3-4c4195b47db3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1d664f11-2b02-4372-afb3-4c4195b47db3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f436e506-231d-48e7-90c6-83814e4d6deb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_03fbfdf3-35fb-42ab-93dd-5b41fbc4bb0e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f436e506-231d-48e7-90c6-83814e4d6deb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_e1d891d3-2eab-42f7-97f4-549f6fea3b38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f436e506-231d-48e7-90c6-83814e4d6deb" xlink:to="loc_us-gaap_PlanNameAxis_e1d891d3-2eab-42f7-97f4-549f6fea3b38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e1d891d3-2eab-42f7-97f4-549f6fea3b38_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_e1d891d3-2eab-42f7-97f4-549f6fea3b38" xlink:to="loc_us-gaap_PlanNameDomain_e1d891d3-2eab-42f7-97f4-549f6fea3b38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_8e1d305d-2f1e-4363-ac35-61eb0f070348" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_e1d891d3-2eab-42f7-97f4-549f6fea3b38" xlink:to="loc_us-gaap_PlanNameDomain_8e1d305d-2f1e-4363-ac35-61eb0f070348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_A2020EmployeeStockPurchasePlanMember_980b9e0b-f195-4e30-b6bb-a89d41d2677e" xlink:href="afrm-20220630.xsd#afrm_A2020EmployeeStockPurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_8e1d305d-2f1e-4363-ac35-61eb0f070348" xlink:to="loc_afrm_A2020EmployeeStockPurchasePlanMember_980b9e0b-f195-4e30-b6bb-a89d41d2677e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/EquityIncentivePlansScheduleofTranchesDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#EquityIncentivePlansScheduleofTranchesDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/EquityIncentivePlansScheduleofTranchesDetails" xlink:type="extended" id="i9796efae48464380b9391d54d3d8e3f4_EquityIncentivePlansScheduleofTranchesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e03a56f0-54f3-413a-ac25-792fa76c9224" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharePriceHurdleToSatisfyPerformanceCondition_1197e186-823a-4336-8b27-ee29f648f06e" xlink:href="afrm-20220630.xsd#afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharePriceHurdleToSatisfyPerformanceCondition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e03a56f0-54f3-413a-ac25-792fa76c9224" xlink:to="loc_afrm_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharePriceHurdleToSatisfyPerformanceCondition_1197e186-823a-4336-8b27-ee29f648f06e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_fd0b2b4f-249c-4244-b94e-66209b13ba44" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e03a56f0-54f3-413a-ac25-792fa76c9224" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_fd0b2b4f-249c-4244-b94e-66209b13ba44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13129dcd-dde8-480d-81fd-4bf75e68027d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e03a56f0-54f3-413a-ac25-792fa76c9224" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13129dcd-dde8-480d-81fd-4bf75e68027d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_41e4b3b3-7025-45ba-a06b-af4dc7dfaad4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13129dcd-dde8-480d-81fd-4bf75e68027d" xlink:to="loc_us-gaap_AwardTypeAxis_41e4b3b3-7025-45ba-a06b-af4dc7dfaad4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_41e4b3b3-7025-45ba-a06b-af4dc7dfaad4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_41e4b3b3-7025-45ba-a06b-af4dc7dfaad4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_41e4b3b3-7025-45ba-a06b-af4dc7dfaad4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a70d5083-db8a-453f-9eb8-2d6bcca35c98" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_41e4b3b3-7025-45ba-a06b-af4dc7dfaad4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a70d5083-db8a-453f-9eb8-2d6bcca35c98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_PerformanceBasedStockOptionsMember_fe01e2cd-2a48-4dd3-8864-5b3a5ead6510" xlink:href="afrm-20220630.xsd#afrm_PerformanceBasedStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a70d5083-db8a-453f-9eb8-2d6bcca35c98" xlink:to="loc_afrm_PerformanceBasedStockOptionsMember_fe01e2cd-2a48-4dd3-8864-5b3a5ead6510" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_05dfe97d-9f9d-46b8-b605-549c75758dc0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13129dcd-dde8-480d-81fd-4bf75e68027d" xlink:to="loc_us-gaap_VestingAxis_05dfe97d-9f9d-46b8-b605-549c75758dc0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_05dfe97d-9f9d-46b8-b605-549c75758dc0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_05dfe97d-9f9d-46b8-b605-549c75758dc0" xlink:to="loc_us-gaap_VestingDomain_05dfe97d-9f9d-46b8-b605-549c75758dc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_05dfe97d-9f9d-46b8-b605-549c75758dc0" xlink:to="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_4c3df81c-07e2-453a-b75b-d8795548cf80" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_4c3df81c-07e2-453a-b75b-d8795548cf80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_bb20fabf-1a4d-4c16-af7d-3c3d136a7b63" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_bb20fabf-1a4d-4c16-af7d-3c3d136a7b63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_c1eead3a-a734-4d54-8341-f059618bea4c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_c1eead3a-a734-4d54-8341-f059618bea4c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheFourMember_ebfa2bae-b4d8-4c72-880b-e91b0c4bd01c" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheFourMember_ebfa2bae-b4d8-4c72-880b-e91b0c4bd01c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheFiveMember_bc2750d2-853b-4fb2-9f91-e1b67a1a7638" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheFiveMember_bc2750d2-853b-4fb2-9f91-e1b67a1a7638" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheSixMember_948bc370-28e5-4971-9336-43072b7d2d64" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheSixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheSixMember_948bc370-28e5-4971-9336-43072b7d2d64" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheSevenMember_68ade8dd-e321-4e04-b8f3-377e3ecdb2b6" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheSevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheSevenMember_68ade8dd-e321-4e04-b8f3-377e3ecdb2b6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheEightMember_ab0812d2-1635-4149-a48b-71c7a19872bb" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheEightMember_ab0812d2-1635-4149-a48b-71c7a19872bb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheNineMember_3897f1f0-ced6-4bb7-9648-7ed4b4cf5a4f" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheNineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheNineMember_3897f1f0-ced6-4bb7-9648-7ed4b4cf5a4f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ShareBasedPaymentArrangementTrancheTenMember_8c5fa7d8-443b-4fda-9ed4-e8730e54165e" xlink:href="afrm-20220630.xsd#afrm_ShareBasedPaymentArrangementTrancheTenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_0e40eb7f-a1d4-4e11-9210-62be1260e127" xlink:to="loc_afrm_ShareBasedPaymentArrangementTrancheTenMember_8c5fa7d8-443b-4fda-9ed4-e8730e54165e" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/EquityIncentivePlansRSUActivityDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#EquityIncentivePlansRSUActivityDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/EquityIncentivePlansRSUActivityDetails" xlink:type="extended" id="if6ae00cc410e4c05bad63046fcaecde0_EquityIncentivePlansRSUActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4392077a-fe88-4ae0-9bdc-e6bacea643a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_0ceb70ed-14d4-4a60-8d4b-4ec31a123737" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4392077a-fe88-4ae0-9bdc-e6bacea643a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_0ceb70ed-14d4-4a60-8d4b-4ec31a123737" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5a02612d-5e62-4030-af5c-8e0b7c279453" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_0ceb70ed-14d4-4a60-8d4b-4ec31a123737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5a02612d-5e62-4030-af5c-8e0b7c279453" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_6ac8dadc-b00a-4181-8215-8e6c50641653" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_0ceb70ed-14d4-4a60-8d4b-4ec31a123737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_6ac8dadc-b00a-4181-8215-8e6c50641653" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_ca790976-2cef-4cdf-b0e5-27a987324318" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_0ceb70ed-14d4-4a60-8d4b-4ec31a123737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_ca790976-2cef-4cdf-b0e5-27a987324318" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d4e34eb9-eeea-4b3b-b04a-20e869f463a9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_0ceb70ed-14d4-4a60-8d4b-4ec31a123737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d4e34eb9-eeea-4b3b-b04a-20e869f463a9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c936e566-ff7e-4c4f-a12a-3101c88af62c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1175651a-bf7a-414a-b2e0-5c1ac75148ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4392077a-fe88-4ae0-9bdc-e6bacea643a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1175651a-bf7a-414a-b2e0-5c1ac75148ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_ef4e0436-1263-4e28-aca6-059dce676b45" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1175651a-bf7a-414a-b2e0-5c1ac75148ac" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_ef4e0436-1263-4e28-aca6-059dce676b45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4c6e5d7a-332e-42a2-ac20-4183a79046cd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1175651a-bf7a-414a-b2e0-5c1ac75148ac" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4c6e5d7a-332e-42a2-ac20-4183a79046cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_8f3bf045-2038-43e4-bdd3-b8584ea2e8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1175651a-bf7a-414a-b2e0-5c1ac75148ac" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_8f3bf045-2038-43e4-bdd3-b8584ea2e8f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_803e9979-e119-4336-b5a2-f420c8391da1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1175651a-bf7a-414a-b2e0-5c1ac75148ac" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_803e9979-e119-4336-b5a2-f420c8391da1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_510a7bde-cc57-4c80-b4c9-907e9e5fe6e4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71a4ee1d-624e-4a45-a570-82ac82642fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4392077a-fe88-4ae0-9bdc-e6bacea643a5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71a4ee1d-624e-4a45-a570-82ac82642fe3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_983c3bcb-0c00-4541-a8fd-4f50f3bf490a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71a4ee1d-624e-4a45-a570-82ac82642fe3" xlink:to="loc_us-gaap_AwardTypeAxis_983c3bcb-0c00-4541-a8fd-4f50f3bf490a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_983c3bcb-0c00-4541-a8fd-4f50f3bf490a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_983c3bcb-0c00-4541-a8fd-4f50f3bf490a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_983c3bcb-0c00-4541-a8fd-4f50f3bf490a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2fa6f47d-c34d-4ab3-91cf-c51449d0d741" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_983c3bcb-0c00-4541-a8fd-4f50f3bf490a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2fa6f47d-c34d-4ab3-91cf-c51449d0d741" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_c963386c-6039-484f-98cc-e659975cddf7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2fa6f47d-c34d-4ab3-91cf-c51449d0d741" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_c963386c-6039-484f-98cc-e659975cddf7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/EquityIncentivePlansComponentsandClassificationofStockbasedCompensationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#EquityIncentivePlansComponentsandClassificationofStockbasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/EquityIncentivePlansComponentsandClassificationofStockbasedCompensationDetails" xlink:type="extended" id="idb9d893018204ccf8955d8db946a5092_EquityIncentivePlansComponentsandClassificationofStockbasedCompensationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ab2f7bed-e64a-411c-939b-007e9d2a9842" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_59eda04f-cb00-45ae-ba9c-3999ce0c63b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ab2f7bed-e64a-411c-939b-007e9d2a9842" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_59eda04f-cb00-45ae-ba9c-3999ce0c63b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_908fd0bc-6220-4f0f-8aae-b930f1e3e2c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ab2f7bed-e64a-411c-939b-007e9d2a9842" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_908fd0bc-6220-4f0f-8aae-b930f1e3e2c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_e36de1e5-90c7-4284-92e8-c922125674d8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ab2f7bed-e64a-411c-939b-007e9d2a9842" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_e36de1e5-90c7-4284-92e8-c922125674d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_d31cfc56-d4fa-4db6-a663-073e9888710d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ab2f7bed-e64a-411c-939b-007e9d2a9842" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_d31cfc56-d4fa-4db6-a663-073e9888710d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_72e77f83-469b-4d6a-84fd-bc4d91388d62" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_d31cfc56-d4fa-4db6-a663-073e9888710d" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_72e77f83-469b-4d6a-84fd-bc4d91388d62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_72e77f83-469b-4d6a-84fd-bc4d91388d62_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_72e77f83-469b-4d6a-84fd-bc4d91388d62" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_72e77f83-469b-4d6a-84fd-bc4d91388d62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_ae1386d4-b680-40b5-bc58-23c861c4ba26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_72e77f83-469b-4d6a-84fd-bc4d91388d62" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_ae1386d4-b680-40b5-bc58-23c861c4ba26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_82da6bca-4073-40dd-b396-a1f70f1b679f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_ae1386d4-b680-40b5-bc58-23c861c4ba26" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_82da6bca-4073-40dd-b396-a1f70f1b679f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_TechnologyAndDataAnalyticsExpenseMember_79e303c9-2798-4e69-9531-be8eaad11776" xlink:href="afrm-20220630.xsd#afrm_TechnologyAndDataAnalyticsExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_ae1386d4-b680-40b5-bc58-23c861c4ba26" xlink:to="loc_afrm_TechnologyAndDataAnalyticsExpenseMember_79e303c9-2798-4e69-9531-be8eaad11776" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_f26b94db-e51d-4c16-9328-165003931602" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_ae1386d4-b680-40b5-bc58-23c861c4ba26" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_f26b94db-e51d-4c16-9328-165003931602" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_ProcessingAndServicingExpenseMember_85416cbf-58a3-47c0-87a7-2c286ab167ac" xlink:href="afrm-20220630.xsd#afrm_ProcessingAndServicingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_ae1386d4-b680-40b5-bc58-23c861c4ba26" xlink:to="loc_afrm_ProcessingAndServicingExpenseMember_85416cbf-58a3-47c0-87a7-2c286ab167ac" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/IncomeTaxesAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#IncomeTaxesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/IncomeTaxesAdditionalInformationDetails" xlink:type="extended" id="i0119170543454fcca953126c87f6eef9_IncomeTaxesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwardsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_3d3696cd-7739-4074-a361-f874e09adb72" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_3d3696cd-7739-4074-a361-f874e09adb72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_c7939c17-59b1-47bf-9f5a-c3850b2fb1e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_us-gaap_OperatingLossCarryforwards_c7939c17-59b1-47bf-9f5a-c3850b2fb1e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_03ab5f9c-0bdc-4026-87a0-837fdc2f19e3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_03ab5f9c-0bdc-4026-87a0-837fdc2f19e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_OperatingLossCarryforwardsSubjectToExpiration_43aa475e-d78c-4d80-9616-16ca5990fe34" xlink:href="afrm-20220630.xsd#afrm_OperatingLossCarryforwardsSubjectToExpiration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_afrm_OperatingLossCarryforwardsSubjectToExpiration_43aa475e-d78c-4d80-9616-16ca5990fe34" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_1ade07ba-1a42-4fa3-b6cc-8e3f90046ced" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_1ade07ba-1a42-4fa3-b6cc-8e3f90046ced" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_a2fef605-129b-4e2b-a9ec-71e8ef320527" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_a2fef605-129b-4e2b-a9ec-71e8ef320527" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_c0180935-3058-418a-9c26-150b2e3997c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwardsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_50290068-4e8f-43fb-beaa-5714bca80fff" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_c0180935-3058-418a-9c26-150b2e3997c0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_d7c63f2c-f762-4baf-a4f4-907ae5309686" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_c0180935-3058-418a-9c26-150b2e3997c0" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_d7c63f2c-f762-4baf-a4f4-907ae5309686" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_d7c63f2c-f762-4baf-a4f4-907ae5309686_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_d7c63f2c-f762-4baf-a4f4-907ae5309686" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_d7c63f2c-f762-4baf-a4f4-907ae5309686_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_24e9a4d4-87db-4a1b-831f-acb6e10a7064" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_d7c63f2c-f762-4baf-a4f4-907ae5309686" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_24e9a4d4-87db-4a1b-831f-acb6e10a7064" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_f5a4c173-8149-4f87-a516-67890bac3531" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_24e9a4d4-87db-4a1b-831f-acb6e10a7064" xlink:to="loc_us-gaap_DomesticCountryMember_f5a4c173-8149-4f87-a516-67890bac3531" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_b4260382-e343-4a53-bce7-2cde93be8cfd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_24e9a4d4-87db-4a1b-831f-acb6e10a7064" xlink:to="loc_us-gaap_ForeignCountryMember_b4260382-e343-4a53-bce7-2cde93be8cfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_161f8f36-cf7a-4a0c-946c-193808213a23" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_24e9a4d4-87db-4a1b-831f-acb6e10a7064" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_161f8f36-cf7a-4a0c-946c-193808213a23" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_c85b737c-e6b5-4a8e-9519-e5b3a39fe22f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_c0180935-3058-418a-9c26-150b2e3997c0" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_c85b737c-e6b5-4a8e-9519-e5b3a39fe22f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_c85b737c-e6b5-4a8e-9519-e5b3a39fe22f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_c85b737c-e6b5-4a8e-9519-e5b3a39fe22f" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_c85b737c-e6b5-4a8e-9519-e5b3a39fe22f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_da919209-f998-45bd-9d2e-4f2ec7d8dcbc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_c85b737c-e6b5-4a8e-9519-e5b3a39fe22f" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_da919209-f998-45bd-9d2e-4f2ec7d8dcbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchMember_dd43e080-1df5-4c86-a28e-318e988bacd9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResearchMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_da919209-f998-45bd-9d2e-4f2ec7d8dcbc" xlink:to="loc_us-gaap_ResearchMember_dd43e080-1df5-4c86-a28e-318e988bacd9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/NetLossperShareAttributabletoCommonStockholdersAdditionalInformationDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#NetLossperShareAttributabletoCommonStockholdersAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/NetLossperShareAttributabletoCommonStockholdersAdditionalInformationDetails" xlink:type="extended" id="iec7fcd67767c48da9095d9176d3cc2b8_NetLossperShareAttributabletoCommonStockholdersAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_9a6e2536-03ab-4f3a-92c4-7032e6cc7a58" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_00827132-cd11-4669-a94f-1b0ba6e411a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_9a6e2536-03ab-4f3a-92c4-7032e6cc7a58" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_00827132-cd11-4669-a94f-1b0ba6e411a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_5e3952fd-7ef5-4afd-8126-31887a1df6d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_9a6e2536-03ab-4f3a-92c4-7032e6cc7a58" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_5e3952fd-7ef5-4afd-8126-31887a1df6d3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_f5720446-9168-417f-a90f-4f654a595abd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_5e3952fd-7ef5-4afd-8126-31887a1df6d3" xlink:to="loc_us-gaap_StatementClassOfStockAxis_f5720446-9168-417f-a90f-4f654a595abd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_f5720446-9168-417f-a90f-4f654a595abd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_f5720446-9168-417f-a90f-4f654a595abd" xlink:to="loc_us-gaap_ClassOfStockDomain_f5720446-9168-417f-a90f-4f654a595abd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_47f70dc1-3eb6-4958-86c8-94bb7a0136af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_f5720446-9168-417f-a90f-4f654a595abd" xlink:to="loc_us-gaap_ClassOfStockDomain_47f70dc1-3eb6-4958-86c8-94bb7a0136af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_2a7ac8ba-dd68-44ab-a705-eedecdb6e614" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_47f70dc1-3eb6-4958-86c8-94bb7a0136af" xlink:to="loc_us-gaap_CommonClassAMember_2a7ac8ba-dd68-44ab-a705-eedecdb6e614" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_dc7950e4-8c30-4336-905f-a0b5b4fdb35c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_47f70dc1-3eb6-4958-86c8-94bb7a0136af" xlink:to="loc_us-gaap_CommonClassBMember_dc7950e4-8c30-4336-905f-a0b5b4fdb35c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/NetLossperShareAttributabletoCommonStockholdersBasicandDilutedNetLossPerShareDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#NetLossperShareAttributabletoCommonStockholdersBasicandDilutedNetLossPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/NetLossperShareAttributabletoCommonStockholdersBasicandDilutedNetLossPerShareDetails" xlink:type="extended" id="if4977f2b62f44c62a7d76aa8058aeb49_NetLossperShareAttributabletoCommonStockholdersBasicandDilutedNetLossPerShareDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDilutedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_bae743cc-5a62-4fa2-9dd8-108de71302a1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_bae743cc-5a62-4fa2-9dd8-108de71302a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_86036dbb-89bd-4c79-90a7-dcf1a8275ed2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_bae743cc-5a62-4fa2-9dd8-108de71302a1" xlink:to="loc_us-gaap_NetIncomeLoss_86036dbb-89bd-4c79-90a7-dcf1a8275ed2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_55eeab1f-974f-44fc-8c69-1bae76d67083" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_bae743cc-5a62-4fa2-9dd8-108de71302a1" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_55eeab1f-974f-44fc-8c69-1bae76d67083" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_260c8a43-eb37-41db-90a7-c2761ee31ed6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_260c8a43-eb37-41db-90a7-c2761ee31ed6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_b3a6ad42-de60-4f26-91a9-8f7ee694f31b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_260c8a43-eb37-41db-90a7-c2761ee31ed6" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_b3a6ad42-de60-4f26-91a9-8f7ee694f31b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther_9524cc5d-f4a8-4b05-9b61-528bbcfedc71" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_260c8a43-eb37-41db-90a7-c2761ee31ed6" xlink:to="loc_us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther_9524cc5d-f4a8-4b05-9b61-528bbcfedc71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_5a2bd496-7c42-48cd-bfd5-bb2995758d7a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_260c8a43-eb37-41db-90a7-c2761ee31ed6" xlink:to="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_5a2bd496-7c42-48cd-bfd5-bb2995758d7a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_bc8b5d4d-8979-47f5-ae01-b871020af091" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_260c8a43-eb37-41db-90a7-c2761ee31ed6" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_bc8b5d4d-8979-47f5-ae01-b871020af091" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_0d2bdb0a-e3f1-42fd-beac-74b5700a5ec8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_0d2bdb0a-e3f1-42fd-beac-74b5700a5ec8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_831e382f-0b98-42b4-8f64-4a127bab0614" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_0d2bdb0a-e3f1-42fd-beac-74b5700a5ec8" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_831e382f-0b98-42b4-8f64-4a127bab0614" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_b8626987-6788-4492-bf3b-f146b3d01232" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_b8626987-6788-4492-bf3b-f146b3d01232" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_61271573-ee75-4190-889c-5759e31c617e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_b8626987-6788-4492-bf3b-f146b3d01232" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_61271573-ee75-4190-889c-5759e31c617e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_5c94e5b1-2f7a-4858-b25a-00f6f9ec39ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_b8626987-6788-4492-bf3b-f146b3d01232" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_5c94e5b1-2f7a-4858-b25a-00f6f9ec39ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAbstract_9ee7af8c-457b-46ec-91a5-54da932b1784" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:to="loc_us-gaap_EarningsPerShareBasicAbstract_9ee7af8c-457b-46ec-91a5-54da932b1784" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_a4915f43-3d0c-4031-8daf-0dde562f7c35" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_9ee7af8c-457b-46ec-91a5-54da932b1784" xlink:to="loc_us-gaap_EarningsPerShareBasic_a4915f43-3d0c-4031-8daf-0dde562f7c35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_4d493c9c-4394-47eb-af76-b8fd768f00c4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_9ee7af8c-457b-46ec-91a5-54da932b1784" xlink:to="loc_us-gaap_EarningsPerShareDiluted_4d493c9c-4394-47eb-af76-b8fd768f00c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_5ec9b4ed-6138-4c98-9905-0db5ad3eff51" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_16445fe0-818f-4013-b1fc-ecfb2e67277b" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_5ec9b4ed-6138-4c98-9905-0db5ad3eff51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_3cb34b0a-f9d1-482d-8282-fe06ae09164a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_5ec9b4ed-6138-4c98-9905-0db5ad3eff51" xlink:to="loc_us-gaap_StatementClassOfStockAxis_3cb34b0a-f9d1-482d-8282-fe06ae09164a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3cb34b0a-f9d1-482d-8282-fe06ae09164a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3cb34b0a-f9d1-482d-8282-fe06ae09164a" xlink:to="loc_us-gaap_ClassOfStockDomain_3cb34b0a-f9d1-482d-8282-fe06ae09164a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_8a93ae67-84d1-41c5-9d7a-37bb46c072aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3cb34b0a-f9d1-482d-8282-fe06ae09164a" xlink:to="loc_us-gaap_ClassOfStockDomain_8a93ae67-84d1-41c5-9d7a-37bb46c072aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_839825ad-c9a3-4741-a561-67a46c5d332e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8a93ae67-84d1-41c5-9d7a-37bb46c072aa" xlink:to="loc_us-gaap_CommonClassAMember_839825ad-c9a3-4741-a561-67a46c5d332e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_b11a0752-8247-45ad-92f7-d5d12cb40ca3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8a93ae67-84d1-41c5-9d7a-37bb46c072aa" xlink:to="loc_us-gaap_CommonClassBMember_b11a0752-8247-45ad-92f7-d5d12cb40ca3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/NetLossperShareAttributabletoCommonStockholdersCommonStockEquivalentsExcludedfromCalculationofDilutedNetLossPerShareDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#NetLossperShareAttributabletoCommonStockholdersCommonStockEquivalentsExcludedfromCalculationofDilutedNetLossPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/NetLossperShareAttributabletoCommonStockholdersCommonStockEquivalentsExcludedfromCalculationofDilutedNetLossPerShareDetails" xlink:type="extended" id="i4d1e78c5795d457b8708188dff7caf8a_NetLossperShareAttributabletoCommonStockholdersCommonStockEquivalentsExcludedfromCalculationofDilutedNetLossPerShareDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0281fdf6-7402-47e1-aaa8-eef4017d5342" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_4f30e2e2-f75f-4b67-8f32-f8538fd1c133" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0281fdf6-7402-47e1-aaa8-eef4017d5342" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_4f30e2e2-f75f-4b67-8f32-f8538fd1c133" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_9dc507cf-c08d-4d00-a787-5db07502a807" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0281fdf6-7402-47e1-aaa8-eef4017d5342" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_9dc507cf-c08d-4d00-a787-5db07502a807" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc8027be-3af6-4199-840d-d3fe2ed333db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_9dc507cf-c08d-4d00-a787-5db07502a807" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc8027be-3af6-4199-840d-d3fe2ed333db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_bc8027be-3af6-4199-840d-d3fe2ed333db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc8027be-3af6-4199-840d-d3fe2ed333db" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_bc8027be-3af6-4199-840d-d3fe2ed333db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc8027be-3af6-4199-840d-d3fe2ed333db" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_dbd263bc-b07b-41c4-9cca-de12032a6160" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:to="loc_us-gaap_EmployeeStockOptionMember_dbd263bc-b07b-41c4-9cca-de12032a6160" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_595659e1-f00a-4736-8960-8db9296bd92a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_595659e1-f00a-4736-8960-8db9296bd92a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_cdd92a35-6b2f-47f3-b03a-153e6b80134a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:to="loc_us-gaap_WarrantMember_cdd92a35-6b2f-47f3-b03a-153e6b80134a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_41a8c2c6-229c-4b26-8c33-e8de89e6601c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:to="loc_us-gaap_EmployeeStockMember_41a8c2c6-229c-4b26-8c33-e8de89e6601c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_dffde74f-30dd-4842-82bf-66345d43151e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_dffde74f-30dd-4842-82bf-66345d43151e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_0fc33bd8-24ce-4c68-b815-336b09335c61" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f725eddf-0b97-46e3-beeb-250fcd2ad57b" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_0fc33bd8-24ce-4c68-b815-336b09335c61" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SegmentsandGeographicalInformationRevenuebyGeographicAreaDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SegmentsandGeographicalInformationRevenuebyGeographicAreaDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SegmentsandGeographicalInformationRevenuebyGeographicAreaDetails" xlink:type="extended" id="i265c91236578466180a51df91de086d4_SegmentsandGeographicalInformationRevenuebyGeographicAreaDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_f29fc438-6899-4ca7-b341-049a1528f908" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_41bfa183-6045-44d5-a9d2-eeb737f68f62" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_f29fc438-6899-4ca7-b341-049a1528f908" xlink:to="loc_us-gaap_Revenues_41bfa183-6045-44d5-a9d2-eeb737f68f62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_516f4dfb-90bb-4617-b384-a1dc30b9f475" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_f29fc438-6899-4ca7-b341-049a1528f908" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_516f4dfb-90bb-4617-b384-a1dc30b9f475" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_165940c8-3b7a-456c-b490-adad6aadff47" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_516f4dfb-90bb-4617-b384-a1dc30b9f475" xlink:to="loc_srt_StatementGeographicalAxis_165940c8-3b7a-456c-b490-adad6aadff47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_165940c8-3b7a-456c-b490-adad6aadff47_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_165940c8-3b7a-456c-b490-adad6aadff47" xlink:to="loc_srt_SegmentGeographicalDomain_165940c8-3b7a-456c-b490-adad6aadff47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ad8c3803-a7e7-418a-a616-0b24bc0d7c79" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_165940c8-3b7a-456c-b490-adad6aadff47" xlink:to="loc_srt_SegmentGeographicalDomain_ad8c3803-a7e7-418a-a616-0b24bc0d7c79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_e3fa8a9c-3b45-4d28-9b16-a737f03f3fa8" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ad8c3803-a7e7-418a-a616-0b24bc0d7c79" xlink:to="loc_country_US_e3fa8a9c-3b45-4d28-9b16-a737f03f3fa8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_550666d7-8f3d-41f6-9034-f68ba7f0546f" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ad8c3803-a7e7-418a-a616-0b24bc0d7c79" xlink:to="loc_country_CA_550666d7-8f3d-41f6-9034-f68ba7f0546f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_OtherGeographicalMember_14ee0efc-66a9-40a0-934d-562ef4672c3f" xlink:href="afrm-20220630.xsd#afrm_OtherGeographicalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ad8c3803-a7e7-418a-a616-0b24bc0d7c79" xlink:to="loc_afrm_OtherGeographicalMember_14ee0efc-66a9-40a0-934d-562ef4672c3f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.affirm.com/role/SegmentsandGeographicalInformationLonglivedAssetsbyGeographicAreaDetails" xlink:type="simple" xlink:href="afrm-20220630.xsd#SegmentsandGeographicalInformationLonglivedAssetsbyGeographicAreaDetails"/>
  <link:definitionLink xlink:role="http://www.affirm.com/role/SegmentsandGeographicalInformationLonglivedAssetsbyGeographicAreaDetails" xlink:type="extended" id="i22be794625474c6598e60752f57ab128_SegmentsandGeographicalInformationLonglivedAssetsbyGeographicAreaDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_72a0b472-f8cc-4bbe-856c-8e9d71df888f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_ebd6183c-1013-4703-b5fc-15912ada7538" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_72a0b472-f8cc-4bbe-856c-8e9d71df888f" xlink:to="loc_us-gaap_NoncurrentAssets_ebd6183c-1013-4703-b5fc-15912ada7538" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_33dd5256-db2c-483a-8eed-c0adba4c767c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_72a0b472-f8cc-4bbe-856c-8e9d71df888f" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_33dd5256-db2c-483a-8eed-c0adba4c767c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_c8995633-a520-4af9-9c39-6fc36c7a3993" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_33dd5256-db2c-483a-8eed-c0adba4c767c" xlink:to="loc_srt_StatementGeographicalAxis_c8995633-a520-4af9-9c39-6fc36c7a3993" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_c8995633-a520-4af9-9c39-6fc36c7a3993_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_c8995633-a520-4af9-9c39-6fc36c7a3993" xlink:to="loc_srt_SegmentGeographicalDomain_c8995633-a520-4af9-9c39-6fc36c7a3993_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_58ca1613-b443-48ac-9b16-7975832764c2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_c8995633-a520-4af9-9c39-6fc36c7a3993" xlink:to="loc_srt_SegmentGeographicalDomain_58ca1613-b443-48ac-9b16-7975832764c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_1c593ae8-c7bd-4395-86ad-94cb4c0d03cd" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_58ca1613-b443-48ac-9b16-7975832764c2" xlink:to="loc_country_US_1c593ae8-c7bd-4395-86ad-94cb4c0d03cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_5ae7f474-d683-44f1-8e16-c7141ddeb440" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_58ca1613-b443-48ac-9b16-7975832764c2" xlink:to="loc_country_CA_5ae7f474-d683-44f1-8e16-c7141ddeb440" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_afrm_OtherGeographicalMember_47b9b9c3-a5f3-498e-8266-f2d54738bf79" xlink:href="afrm-20220630.xsd#afrm_OtherGeographicalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_58ca1613-b443-48ac-9b16-7975832764c2" xlink:to="loc_afrm_OtherGeographicalMember_47b9b9c3-a5f3-498e-8266-f2d54738bf79" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfOtherComprehensiveIncomeAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfOtherComprehensiveIncomeAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfOtherComprehensiveIncomeAbstract" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
