verb (used with object), up·staged, up·stag·ing.
Examples from the Web for upstaging
The little minx has a gift for upstaging brides on their big day.Hold That Baby Kate! Pippa Parties In Vienna At Fashion Wedding|Tom Sykes|July 14, 2013|DAILY BEAST
Jonathan Schanzer asked whether Hamas was upstaging the PLO.
British Dictionary definitions for upstaging
Word Origin and History for upstaging
1918 (adj.), 1921 (v.); the notion is of drawing attention to oneself (and away from a fellow actor) by moving upstage -- to the rear of the stage -- so that the other actor must face away from the audience. The noun upstage "back of the stage" is recorded from 1870.