— collaborator , n.
/keuh lab"euh rayt'/ , v.i. , collaborated, collaborating .
1. to work, one with another; cooperate, as on a literary work: They collaborated on a novel.
2. to cooperate, usually willingly, with an enemy nation, esp. with an enemy occupying one's country: He collaborated with the Nazis during World War II.
[ 1870-75; collaboratus (ptp. of collaborare ), equiv. to col- COL- 1 + labor work + -atus -ATE 1 ]
Syn. 2. collude, join, assist, abet.