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know-it-all

Definition for know-it-all

noun as in one who claims full knowledge

Strongest matches

smart aleck, wise guy

Weak matches

smart-ass, smarty-pants, walking encyclopedia

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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.

Soft know-it-alls from the city and phonies of any stripe receive rough treatment in his shows, such as the llama farmer from California who gets thrown under a Montana cattle guard in “Yellowstone.”

The idea was to put to rest any worry that she might parade in like a know-it-all.

I have been a know-it-all Dodger fan since the late 1950s and after last season I thought, and hoped, Clayton Kershaw would retire.

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He could come off as a know-it-all, and he tended to ramble when speaking.

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Of course, being a kid is full of trial and error, especially when you’re a know-it-all.

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From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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