The Oxford Thesaurus An A-Z Dictionary of Synonyms - officer n.

1) (public) official, dignitary, office-holder, public servant, office-bearer, (political) appointee, (government) agent, bureaucrat, functionary, commissioner, administrator, manager, director; apparatchik: He was stopped by customs officers who demanded to search his baggage. The bailiff is an officer of the court. 2) policeman, policewoman, police officer, officer of the law, constable, Old-fashioned catchpole, US lawman, peace officer, G-man, T-Man, Colloq gendarme, Slang cop, copper, fuzz, US dick, narc, Brit Old Bill, tec: The officer standing at the door was there to serve a writ.