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.
In an age of impatience and an ADHD approach to consuming wrestling storylines, the fact that fans and media were not given an immediate roadmap to what, exactly, is happening with WrestleMania 41’s top angle infuriated the typical know-it-all social media audience. Alfred Konuwa, Forbes, 2 Mar. 2025 The caricature of Doug Gottlieb is the cheekily overconfident, know-it-all opinionator with no detectable filter. Brian Hamilton, The Athletic, 14 Feb. 2025 That extends to Watson himself, who is portrayed as a master of deductive reasoning, a swaggering know-it-all who has a genius-like understanding of human nature and the world itself. Nina Metz, Chicago Tribune, 12 Feb. 2025 Successful teams today aren’t led by the know-it-all and always right A-type personalities. John Hall, Forbes, 22 Dec. 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

Browse Nearby Words

Cite this Entry

“Know-it-all.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know-it-all. Accessed 19 Apr. 2025.

Kids Definition

know-it-all

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

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