off the stage, or happening behind or at the side of the stage, so that people who are watching cannot see

Offstage performers are hidden from view as they wait in the wings.

An off-stage choir can be heard singing.

used for describing a performer, actor, etc. or their behaviour when they are not acting in a play or film, etc. or not taking part in some other kind of performance

The actor became well-known for his offstage exploits.

Before the interview, she made it clear that her off-stage life was off limits.

Compare: onstage adjective