'collaborationist' definitions:

Definition of 'collaborationist'

From: WordNet
noun
Someone who collaborates with an enemy occupying force [syn: collaborator, collaborationist, quisling]

Definition of 'collaborationist'

From: GCIDE
  • collaborationist \collaborationist\ n. someone who collaborates with an enemy occupying force.
  • Syn: collaborator, quisling. [WordNet 1.5]