off·stage 
/ˈɑ:fˈsteɪʤ/ adverb
/ˈɑ:fˈsteɪʤ/ adverb 1 : on the part of the stage that the audience cannot see : behind or to the side of the stage
▪ She waited offstage for her cue. ▪ We heard a loud crash offstage. — compare backstage, onstage 2 of a performer : in private life
▪ Offstage, the actress is very down-to-earth. 3 : in a place that is away from public view : behind the scenes
▪ Much of the important work of the conference was done offstage.
▪ She waited offstage for her cue. ▪ We heard a loud crash offstage. — compare backstage, onstage
▪ Offstage, the actress is very down-to-earth.
▪ Much of the important work of the conference was done offstage.
— offstage adjective
▪ Their offstage relationship ended soon after the play closed.
▪ Their offstage relationship ended soon after the play closed.
