Definition for one up - Oxford Dictionaries Online (World English)

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	one up (one up) informal adjective having an advantage over someone: you’re always trying to be one up on* whoever you’re with* verb (one-up) [with object] gain an advantage over: he deftly one-upped the interrogator		Search results in the dictionary do someone up in do¹ cry someone/thing up or down in cry cut someone up in cut eaten up in eat fit someone/thing out or up in fit¹ fit someone up in fit¹ More results » Nearby Words oncoming OncoMouse oncoprotein oncost OND Ondaatje, Michael ondes martenot one -one one up one-acter one-armed bandit one-click one-design one-dimensional one-down one-hit wonder one-horse one-liner