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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.

"His vision of the Church was very much the old-style triumphalist Catholicism, the know-all Catholicism."

From BBC

Take the quiz below to find out if you are a Tuchel know-all...

From BBC

Tobin was Tiffany’s manager, and an almost hilariously cliched one: a dominant, abrasive, controlling know-all.

From The Guardian

The book clearly recognizes what it is not: a read-all, know-all drag opus.

From Washington Post

Instead, he launched an assault on the very idea of the narrator, whom he branded a “know-all.”

From The New Yorker