'offstage' definitions:

Definition of 'offstage'

(from WordNet)
adverb
Behind the scenes; not on stage; "the actors were waiting offstage" [ant: onstage]
adverb
Not in public; "the deal was done offstage"
adjective
Situated or taking place in the area of a stage not visible to the audience; "offstage noises" [ant: onstage]
adjective
Concealed from public view or attention; "offstage political meetings" [syn: offstage, backstage]
noun
A stage area out of sight of the audience [syn: wing, offstage, backstage]