Definition of one up in English:

one up

Syllabification: one up
informal

adjective

  • Having a psychological advantage over someone: you’re always trying to be one up on whoever you’re with
    More example sentences
    • The first half produced very little to get excited about and in truth Wrexham should have been at least one up.
    • On the basis that more people drink Guinness than Bass, then he's already one up on Bertie.
    • But on the back of a motorbike you are one up from the scum on the street.

verb

[with object] (one-up) Back to top  
  • Do better than (someone): he deftly one-upped the interrogator
    More example sentences
    • When we last saw Tommy, he was figuring out how his Auburn Tigers could one-up the party in Miami and gain a split national championship with some well-timed posturing and pleading after his little tryst with Frank in New Orleans.
    • ‘Yeah, too bad it didn't win’ said Kate, taking advantage of her opportunity to one-up Holly
    • Man, just when I thought I'd done a decent job of promoting the blogosphere, Pejman one-ups me.

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Word of the day milord
Pronunciation: mɪˈlɔːd
noun
used to address an English nobleman