backstage

(noun) a stage area out of sight of the audience. Synonyms: wing, offstage.

(adj) concealed from public view or attention. Synonyms: offstage. Example: "Offstage political meetings."

(adv) out of view of the public; behind the scenes. Examples: "Working backstage to gain political support for his proposal." "Many private deals were made backstage at the convention."

(adv) in or to a backstage area of a theater. Example: "Costumes were changed backstage."