When an actor or entertainer goes offstage, they go into the area behind or to the side of the stage, so that the audience no longer sees them. She ran offstage in tears There was a lot of noise offstage. onstage
Offstage is used to describe the behaviour of actors or entertainers in real life, when they are not performing. the tragedies of their off-stage lives. onstage Offstage is also an adverb. Despite their bitter screen rivalry, off-stage they are close friends. onstage