know-it-all

noun

: one who claims to know everything
also : one who disdains advice
know-it-all adjective

Examples of know-it-all in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Successful teams today aren’t led by the know-it-all and always right A-type personalities. John Hall, Forbes, 22 Dec. 2024 By Marci Robin December 19, 2024 Normally, know-it-alls are kind of annoying. Marci Robin, Allure, 19 Dec. 2024 Dear Abby: My 21-year-old grandson is a dramatic and arrogant know-it-all. Abigail Van Buren, Boston Herald, 26 Sep. 2024 Even Della Guardia, that slimy know-it-all, seems like a bastion of integrity in comparison. Rafaela Bassili, Vulture, 12 June 2024 See all Example Sentences for know-it-all 

Word History

First Known Use

1873, in the meaning defined above

Time Traveler
The first known use of know-it-all was in 1873

Dictionary Entries Near know-it-all

Cite this Entry

“Know-it-all.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know-it-all. Accessed 2 Jan. 2025.

Kids Definition

know-it-all

noun
ˈnō-ət-ˌȯl
: a person who always claims to know everything

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