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Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Informal One who claims to know everything and rejects advice or information from others.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Someone who obnoxiously claims to be knowledgeable on a subject.

from the GNU version of the Collaborative International Dictionary of English

  • n. One who knows everything

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. someone who thinks he knows everything and refuses to accept advice or information from others

Etymologies

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Examples

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