serving temporarily, esp. as a substitute during another's absence; not permanent; temporary

the acting mayor.

designed, adapted, or suitable for stage performance.

provided with detailed stage directions for the performer

an acting version of a play.

the art, profession, or activity of those who perform in stage plays, motion pictures, etc.

adjective

permanent

adjective

ad interim , adjutant , alternate , assistant , delegated , deputy , interim , pro tem , pro tempore , provisional , surrogate , temporary , affected , dramatic , histrionic , melodramatic , operatic , pretending , showy , substitutionary , theatrical , thespian , tragicomic , vicarious

noun

assuming , characterization , depiction , dramatics , dramatizing , enacting , enactment , feigning , hamming , histrionics , imitating , imitation , impersonation , improvisation , mime , mimicry , pantomime , performance , play acting , playing , portrayal , portraying , posing , posturing , pretending , pretense , putting , rendition , seeming , showing off , simulating , stagecraft , stooging , theatre , theatricals , stage , disguise , dissemblance , masquerade , sham , show , simulation , affectation mimicry , footlights , histrionic , histrionicism , histrionism , pantomime(acting without speaking) , personation , stage-playing , theatricality