Onstage refers to being in front of an audience or visible from the stage area.
When people talk about something happening onstage, they usually mean it's taking place at a theater, concert hall, or other performance venue. Imagine watching a play or musical – the actors are onstage, while the orchestra is typically offstage, hidden from view but still making the music sound great. If you're an actor yourself, being called "onstage" means you'll be up there in front of all those people! Onstage can also refer to being famous or well-known for your work, like a super popular musician who's always on tour and performing onstage.
On the part of a stage that is visible to the audience.
Taking place on the part of a stage that is visible to the audience.
