Meaning : Treat snobbishly, put in one's place.
Meaning : Move upstage, forcing the other actors to turn away from the audience.
Meaning : Steal the show, draw attention to oneself away from someone else.
Example :
When the dog entered the stage, he upstaged the actress.
Meaning : At or toward the rear of the stage.
Example :
The dancers were directed to move upstage.