upstage (Adjective) — Of the back half of a stage. ex. "she crossed to the upstage chair forcing the lead to turn his back to the audience"
upstage (Adjective) — Remote in manner. ex. "he was upstage with strangers"
upstage (Noun) — The rear part of the stage.
upstage (Verb) — Treat snobbishly, put in one's place.
upstage (Verb) — Move upstage, forcing the other actors to turn away from the audience.
upstage (Verb) — Steal the show, draw attention to oneself away from someone else. ex. "When the dog entered the stage, he upstaged the actress"
upstage (Adverb) — (dramaturgy) at or toward the rear of the stage. ex. "the dancers were directed to move upstage"