one-up Hear it!

one-up definition

one·-up (wun′up′, wun′-)

adjective

Informal having an advantage (over another): often in the phrase be one-up on

transitive verb one-upped -·upped′, one-upping -·up′ping

Informal to have or seize an advantage over

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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