1. [adv]  (theater) at or toward the rear of the stage; "the dancers were directed to move upstage"
2. [adj]  of the back half of a stage; "she crossed to the upstage chair forcing the lead to turn his back to the audience"
3. [v]  steal the show, draw attention to oneself away from someone else
4. [v]  move (another actor) upstage, forcing him to turn away from the audience
5. [v]  treat snobbishly, put in one's place

UPSTAGE is a 7 letter word that starts with U.