off ‧ stage /ˌɒfˈsteɪdʒ◂ $ ˌɒːf-/ BrE AmE adverb
1 . just behind or to the side of a stage in a theatre, where the people watching a play cannot see OPP onstage :
There was a loud crash offstage.
2 . when an actor is not acting:
Offstage, Peter seemed a shy sort of person.
—offstage adjective :
offstage noises