behind the proscenium in a theater, especially in the wings or dressing rooms.
toward the rear of the stage
out of view of the public; in private; behind the scenes: Many of the deals were made backstage at the convention.
located or occurring backstage.
of or pertaining to activities unknown to the public.
of or pertaining to the private lives of people in the entertainment industry: backstage gossip.
Theater. a backstage area.