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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:fd6da687-cd77-4602-9593-6d28317c682f,g:e1c1427c-21e7-4c7b-a07c-84b5de45ad1b-->
<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.marketwise.com/role/DocumentandEntityInformationDocument" xlink:type="simple" xlink:href="mktw-20240513.xsd#DocumentandEntityInformationDocument"/>
  <link:definitionLink xlink:role="http://www.marketwise.com/role/DocumentandEntityInformationDocument" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_0016cc89-ceca-47f5-a78a-32852f87b6fe" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntitiesTable_0016cc89-ceca-47f5-a78a-32852f87b6fe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_73cedeca-14a5-492b-8d0a-1ede342430cc" 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_EntitiesTable_0016cc89-ceca-47f5-a78a-32852f87b6fe" xlink:to="loc_us-gaap_StatementClassOfStockAxis_73cedeca-14a5-492b-8d0a-1ede342430cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_73cedeca-14a5-492b-8d0a-1ede342430cc_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_73cedeca-14a5-492b-8d0a-1ede342430cc" xlink:to="loc_us-gaap_ClassOfStockDomain_73cedeca-14a5-492b-8d0a-1ede342430cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_0c386a72-ee86-46b9-89c2-23e8c99f624a" 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_73cedeca-14a5-492b-8d0a-1ede342430cc" xlink:to="loc_us-gaap_ClassOfStockDomain_0c386a72-ee86-46b9-89c2-23e8c99f624a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_b2ccf829-4384-4632-95ff-3a5d3d8e4d0d" 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_0c386a72-ee86-46b9-89c2-23e8c99f624a" xlink:to="loc_us-gaap_CommonClassAMember_b2ccf829-4384-4632-95ff-3a5d3d8e4d0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_f662f281-e358-415c-afb0-74cc396c9959" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_DocumentType_f662f281-e358-415c-afb0-74cc396c9959" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_ada026e2-64b1-493b-878c-4ed763bf2f53" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_DocumentPeriodEndDate_ada026e2-64b1-493b-878c-4ed763bf2f53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_086f2b5c-d650-4eae-a466-23e0051f04d9" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityRegistrantName_086f2b5c-d650-4eae-a466-23e0051f04d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_06b79b59-d9a4-4552-86c0-2c18ff443473" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityIncorporationStateCountryCode_06b79b59-d9a4-4552-86c0-2c18ff443473" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_208ca04d-4dd5-4ca3-99d2-6cc3509eceae" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityFileNumber_208ca04d-4dd5-4ca3-99d2-6cc3509eceae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_1ea75d9b-bd7e-4d89-b84b-7302c13533e5" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityTaxIdentificationNumber_1ea75d9b-bd7e-4d89-b84b-7302c13533e5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_e68a6e00-ab19-40ca-834c-ffc237fdc72c" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityAddressAddressLine1_e68a6e00-ab19-40ca-834c-ffc237fdc72c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_157171ab-2f2b-4a53-a3af-717f18dc2e1c" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityAddressCityOrTown_157171ab-2f2b-4a53-a3af-717f18dc2e1c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_44faa304-bcd9-4d6f-af8a-94edafbd858b" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityAddressStateOrProvince_44faa304-bcd9-4d6f-af8a-94edafbd858b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_96dd1bbe-85ef-4264-8e0f-4e62bf4545c5" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityAddressPostalZipCode_96dd1bbe-85ef-4264-8e0f-4e62bf4545c5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_0358baad-9b26-41a5-88cb-948b54f7c9a3" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_CityAreaCode_0358baad-9b26-41a5-88cb-948b54f7c9a3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_f87f1764-cb11-4fe4-bc95-2f8caf46d900" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_LocalPhoneNumber_f87f1764-cb11-4fe4-bc95-2f8caf46d900" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_9787ed9a-e300-453a-9492-b8ce9ab30743" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_WrittenCommunications_9787ed9a-e300-453a-9492-b8ce9ab30743" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_d8bbbb02-928a-46eb-b25b-b3584b7783c5" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_SolicitingMaterial_d8bbbb02-928a-46eb-b25b-b3584b7783c5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_d9c33f78-bccc-410b-9f41-0f273995796c" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_PreCommencementTenderOffer_d9c33f78-bccc-410b-9f41-0f273995796c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_96a98038-1d45-4593-8601-c4cc85e081c9" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_96a98038-1d45-4593-8601-c4cc85e081c9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_ac2e6f9d-6517-4519-be42-30ecb3909d9a" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_Security12bTitle_ac2e6f9d-6517-4519-be42-30ecb3909d9a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_1bad4087-1337-4b7a-8e54-8afdbd4a44e5" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_TradingSymbol_1bad4087-1337-4b7a-8e54-8afdbd4a44e5" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_6ff46dae-cf14-417d-a40d-082d7aad1a58" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_SecurityExchangeName_6ff46dae-cf14-417d-a40d-082d7aad1a58" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_8ee06211-d7f6-46aa-8c9f-beb4667ee48b" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityEmergingGrowthCompany_8ee06211-d7f6-46aa-8c9f-beb4667ee48b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_23a87b56-0791-4e5b-8526-eee03d45d3b9" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityExTransitionPeriod_23a87b56-0791-4e5b-8526-eee03d45d3b9" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_aae8ce40-d156-46b8-a2bc-6f55eddfa867" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_EntityCentralIndexKey_aae8ce40-d156-46b8-a2bc-6f55eddfa867" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_5312d24d-5370-401c-a3c0-2a75038c8915" 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_EntityInformationLineItems_5f5ba93c-b017-432d-ae6f-04400e8b625e" xlink:to="loc_dei_AmendmentFlag_5312d24d-5370-401c-a3c0-2a75038c8915" xlink:type="arc" order="22"/>
  </link:definitionLink>
</link:linkbase>
