/ ˌɒfˈsteɪdʒ; NAmE ˌɔːf-; ˌɑːf-/ adjective
1.
not on the stage in a theatre; not where the audience can see :
offstage sound effects
2.
happening to an actor in real life, not on the stage :
The stars were having an offstage relationship.
► off·stage adverb :
The hero dies offstage.
—compare onstage