[ noh-it-awl ]
/ ˈnoʊ ɪtˌɔl /
a person who acts as though he or she knows everything and who dismisses the opinions, comments, or suggestions of others.
of or characteristic of a know-it-all.
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Origin of know-it-all
First recorded in 1930–35
Words nearby know-it-all
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Idioms and Phrases with know it all
know it all
see know all the answers.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.