theatre UK /ˈθiː.ə.tə/US /ˈθi(ə)tɚ/noun 9forms 1 noun9 •a place where an audience sits facing a stage to watch plays, concerts and other events •Drama or performance as a profession or art form.I worked in theater for twenty-five years. •A cinema.We sat in the back row of the theater and threw popcorn at the screen. •(Australia, rare) A cinema; movie theatre. •(figurative) A conspicuous but unproductive display of action.The Senate confirmation hearings were just theater. •A region where a particular action takes place; a specific field of action, usually with reference to war.His grandfather was in the Pacific theater during the war. •An operating theatre or locale for human experimentation.This man is about to die, get him into theater at once! •A lecture theatre. •Any place rising by steps like the seats of a theater. formstheatres