In terms of attire, one did not upstage the other by looking more sophisticated or fashionable—or elitist, God forbid.
So, Streep rewrote much of her dialogue, which led to tension with her co-star, Hoffman, who felt she was trying to upstage him.
Daily Pic (Venice Biennale Edition): Yuri Ancarani shows that medical magic can upstage the aesthetic kind.
It takes great talent to upstage a man accepting his party's presidential nomination.
Single rose-coloured corduroy curtain for archway up R. hung on upstage side of arch.
Few are native-born New Yorkers, and scarcely any of them go around with their noses in the air in an "upstage Eastern manner."
A similar door, opening into the bedroom of the shack, upstage right.
upstage, burned a driftwood fire in a low hearth of rough bricks; Judge Tiffany sat there, in a spindle-backed chair, reading.
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.