know-it-all

noun

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

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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 27 Sep. 2022.

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Kids Definition

know-it-all

noun

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

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