back·stage / ˈbakˈstāj/ • n. the area in a theater out of view of the audience, esp. in the wings or dressing rooms.• adj. of, relating to, or situated in the area behind the stage in a theater. ∎ fig. kept from public scrutiny; secret: backstage deals.• adv. in or to the backstage area in a theater. ∎ fig. not known to the public; in secret: we planned our strategies backstage.