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know-all

American  
[noh-awl] / ˈnoʊˌɔl /

noun

Informal.
  1. a know-it-all.


know-all British  

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

Etymology

Origin of know-all

First recorded in 1880–85

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Steering away from the competitive tendencies of know-all musos, like those memorably sent up in Nick Hornby's 1995 novel High Fidelity, Fitzgerald wanted the club to concentrate on getting personal reactions to much-loved LPs.

From BBC • Oct. 20, 2017

IT know-all puts Gareth in his place: "Oi, no professionals."

From The Guardian • Jul. 8, 2011

It is left to Geraldine Fitzgerald as a pipe-smoking Scottish school teacher and Christopher Godwin as a widely travelled know-all to persuade us that the English countryside is not populated entirely by half-wits.

From The Guardian • Nov. 24, 2010

Suddenly he is among us again, the schoolmaster's tone unmistakable, the detachable collar and know-all smile the same he wore when he disappeared several decades ago.

From Time Magazine Archive

Briony had heard a know-all porter saying, with what sounded like satisfaction, that nothing now could stop the German army.

From "Atonement" by Ian McEwan

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