crusade - definition and synonyms

verb [intransitive] 

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/kruːˈseɪd/
present tense
I/you/we/theycrusade
he/she/itcrusades
present participlecrusading
past tensecrusaded
past participlecrusaded
  1. to work hard for a long time to achieve something that you strongly believe is morally right
    crusade for:

    a lawyer crusading for social justice

    crusade against:

    They’re crusading against child abuse.