[ noun ] someone who collaborates with an enemy occupying force <noun.person>
collaborationist \collaborationist\ n. someone who collaborates with an enemy occupying force.
Syn: collaborator, quisling. [WordNet 1.5]
Based on months of investigative reporting, the magazine accused the collaborationist Vichy government of expecting to profit financially from selling the property confiscated from French Jews, who were later deported to concentration camps.
The chairman of Cosmair, L'Oreal's U.S. distributor, resigned following the disclosure that he once served five years in prison for collaborationist activities during World War II.