WordWeb Online

1. Someone who assists in a plot
   - confederate, henchman, partner in crime
    
2. Someone who collaborates with an enemy occupying force
   - collaborationist, quisling
    
3. An associate in an activity or endeavour or sphere of common interest
   "the musician and the librettist were collaborators"
   - cooperator, partner, pardner

Derived forms: collaborators

See also: collaborate

Type of: accessary, accessory, associate, traitor, treasonist

Encyclopedia: Collaborator