Definition of upstages:
(v) :
(figurative, transitive) To draw attention away from others, especially on-stage.
(v) :
(transitive, theater) To force other actors to face away from the audience by staying upstage.
(n) :
(theater) The part of a stage that is farthest from the audience or camera.
(adv) :
Toward or at the rear of a theatrical stage.
(adv) :
Away from the audience or camera.
(adj) :
At the rear of a stage.