Definitions from Wiktionary ( )

▸ noun:  (theater) The part of a stage that is farthest from the audience or camera.
▸ adverb:  Toward or at the rear of a theatrical stage.
▸ adverb:  Away from the audience or camera.
▸ adjective:  At the rear of a stage.
▸ adjective:  (figurative, obsolete) Haughty, aloof.
▸ verb:  (figurative, transitive) To draw attention away from others, especially on-stage.
▸ verb:  (transitive, theater) To force other actors to face away from the audience by staying upstage.
▸ verb:  (transitive, by extension) To treat snobbishly.
▸ verb:  (medicine, transitive) To restage upward; to restage (a case of a disease, usually a cancer) to a higher stage than that found at last assessment.

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