Entry 2 senses · 2 variants Webster, 1913 backstage · back·stage · IPA /bækˈsteɪd͡ʒ/ n. adj. 01 n. the area on the stage out of sight of the audience. 1. the area on the stage out of sight of the audience.(theater) Syn. wing, wings, offstage. 02 adj. concealed from the public; in private. 1. concealed from the public; in private. Syn. behind the scenes.