Definition of collaborator
: a person who collaborates with another: such as
a : someone who works with another person or group With our students and collaborators, we have developed … a tool that couples a video camera with specialized computation.— Frédo Durand et al.
b : someone who assists an enemy (such as an invader or part of an occupying force) … the Germans had allies and collaborators who, whether from conviction or perceived necessity, sought a privileged place in Hitler's New Order.— Robert Skidelsky
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