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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019efa71-cb22-7ee3-9314-f3ba49dfdba6,g:4343a65c-df3c-4542-b96d-f24036d09a7a-->
<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.bakkt.com/role/Cover" xlink:type="simple" xlink:href="bakkt-20260625.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.bakkt.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019efa71-cb22-7a4c-b9db-145c01feb31f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_DocumentInformationTable_019efa71-cb22-7a4c-b9db-145c01feb31f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019efa71-cb22-7c90-9df8-01d0888819f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019efa71-cb22-7a4c-b9db-145c01feb31f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019efa71-cb22-7c90-9df8-01d0888819f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019efa71-cb22-7c90-9df8-01d0888819f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019efa71-cb22-7c90-9df8-01d0888819f3" xlink:to="loc_us-gaap_ClassOfStockDomain_019efa71-cb22-7c90-9df8-01d0888819f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019efa71-cb22-708f-ade8-7d4c9dbc83d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019efa71-cb22-7c90-9df8-01d0888819f3" xlink:to="loc_us-gaap_ClassOfStockDomain_019efa71-cb22-708f-ade8-7d4c9dbc83d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019efa71-cb22-78e5-951b-8fcbfd218d7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019efa71-cb22-708f-ade8-7d4c9dbc83d6" xlink:to="loc_us-gaap_CommonClassAMember_019efa71-cb22-78e5-951b-8fcbfd218d7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019efa71-cb22-7693-93c8-ab440602ead5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019efa71-cb22-708f-ade8-7d4c9dbc83d6" xlink:to="loc_us-gaap_WarrantMember_019efa71-cb22-7693-93c8-ab440602ead5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019efa71-cb22-7252-9d08-6d639fc6528c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_DocumentType_019efa71-cb22-7252-9d08-6d639fc6528c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019efa71-cb22-73a1-aece-c57bea1e5b39" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_DocumentPeriodEndDate_019efa71-cb22-73a1-aece-c57bea1e5b39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019efa71-cb22-7421-bc51-ae313bec74ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityRegistrantName_019efa71-cb22-7421-bc51-ae313bec74ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019efa71-cb22-7b4a-a131-9d46855c9c6b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019efa71-cb22-7b4a-a131-9d46855c9c6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019efa71-cb22-76b1-99ac-68125fd9cc41" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityFileNumber_019efa71-cb22-76b1-99ac-68125fd9cc41" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019efa71-cb22-7573-a71b-6faf5a66e4d2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityTaxIdentificationNumber_019efa71-cb22-7573-a71b-6faf5a66e4d2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019efa71-cb22-727c-8330-d06160121d36" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityAddressAddressLine1_019efa71-cb22-727c-8330-d06160121d36" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019efa71-cb22-7c07-a2d6-5e231fdc70bb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityAddressAddressLine2_019efa71-cb22-7c07-a2d6-5e231fdc70bb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019efa71-cb22-7df5-85c4-e419ca5fd54f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityAddressCityOrTown_019efa71-cb22-7df5-85c4-e419ca5fd54f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019efa71-cb22-7ce4-a1d2-d1c282b8a99e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityAddressStateOrProvince_019efa71-cb22-7ce4-a1d2-d1c282b8a99e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019efa71-cb22-7d55-bbec-c51bdc48a272" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityAddressPostalZipCode_019efa71-cb22-7d55-bbec-c51bdc48a272" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019efa71-cb22-7a01-86b6-4fac86a99f2f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_CityAreaCode_019efa71-cb22-7a01-86b6-4fac86a99f2f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019efa71-cb22-7e04-ab7d-85b5e337cc4f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_LocalPhoneNumber_019efa71-cb22-7e04-ab7d-85b5e337cc4f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019efa71-cb22-7a8a-888c-6fae9b787624" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_WrittenCommunications_019efa71-cb22-7a8a-888c-6fae9b787624" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019efa71-cb22-746f-8899-8577e02e6d56" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_SolicitingMaterial_019efa71-cb22-746f-8899-8577e02e6d56" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019efa71-cb22-754e-838e-d8167037c181" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_PreCommencementTenderOffer_019efa71-cb22-754e-838e-d8167037c181" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019efa71-cb22-7fd5-a5c4-6910285c186f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019efa71-cb22-7fd5-a5c4-6910285c186f" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019efa71-cb22-76d5-b746-0720337ae12f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_Security12bTitle_019efa71-cb22-76d5-b746-0720337ae12f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019efa71-cb22-756d-98f5-3c4a19ee1dc8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_TradingSymbol_019efa71-cb22-756d-98f5-3c4a19ee1dc8" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019efa71-cb22-75f0-83a1-2788a74541c9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_SecurityExchangeName_019efa71-cb22-75f0-83a1-2788a74541c9" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019efa71-cb22-7ffd-bda5-bb43a9f81104" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityEmergingGrowthCompany_019efa71-cb22-7ffd-bda5-bb43a9f81104" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019efa71-cb22-78c2-8d3b-df55f95cbad1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityExTransitionPeriod_019efa71-cb22-78c2-8d3b-df55f95cbad1" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019efa71-cb22-7d29-8553-81bdd723f02c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_EntityCentralIndexKey_019efa71-cb22-7d29-8553-81bdd723f02c" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019efa71-cb22-78df-850b-dbd51d5907ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019efa71-cb22-7607-b77f-4e1188740a00" xlink:to="loc_dei_AmendmentFlag_019efa71-cb22-78df-850b-dbd51d5907ad" xlink:type="arc" order="23"/>
  </link:definitionLink>
</link:linkbase>
