collaborator

Definitions of collaborator
  1. noun
    an associate in an activity or endeavor or sphere of common interest
    “the musician and the librettist were collaborators
    synonyms: cooperator, pardner, partner
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    types:
    bridge partner
    one of a pair of bridge players who are on the same side of the game
    dancing partner
    one of a pair of people who dance together
    raiser
    a bridge partner who increases the partner's bid
    type of:
    associate
    a person who joins with others in some activity or endeavor
  2. noun
    someone who assists in a plot
    synonyms: confederate, henchman, partner in crime
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    type of:
    accessary, accessory
    someone who helps another person commit a crime
  3. noun
    someone who collaborates with an enemy occupying force
    synonyms: collaborationist, quisling
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    type of:
    traitor, treasonist
    someone who betrays his country by committing treason
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