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know-all

[noh-awl]

noun

Informal.

  1. a know-it-all.

know-all

noun

  1. informal,  a person who pretends or appears to know a great deal

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of know-all1

First recorded in 1880–85

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knowableknow all the answers

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