say it: kuh-LAB-ur-ay-tur
collaborator is a noun meaning "someone who assists in a plot". It carries 3 recorded senses.
someone who assists in a plot
someone who collaborates with an enemy occupying force
an associate in an activity or endeavor or sphere of common interest
“the musician and the librettist were collaborators”
“sexual partners”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for collaborator come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.