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know-it-all

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know-it-all

  [noh-it-awl]
Use know-it-all in a Sentence
–noun
1. a person who acts as though he or she knows everything and who dismisses the opinions, comments, or suggestions of others.
–adjective
2. of or characteristic of a know-it-all.
Origin:
1930–35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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know-it-all   (nō'ĭt-ôl')
n.   Informal
One who claims to know everything and rejects advice or information from others.
know'-it-all' adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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