know-it-all
noun
a person who acts as though they know everything and who dismisses the opinions, comments, or suggestions of others.
know-it-alls
-
pluralof know-it-all.plural
The grammatical form denoting more than one person, place, thing, or idea.
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.
The latter’s proxy was city controller Kenneth Mejia, another person loathed by L.A.’s political know-it-alls because he keeps bucking it.
From Los Angeles Times ● Oct. 14, 2026
Don’t let the know-it-alls fool you: Nobody saw this showdown coming in August.
From The Wall Street Journal ● Jan. 26, 2026
I like this exercise because it’s not a recounting by news know-it-alls.
From Seattle Times ● Dec. 28, 2023
We now live in a world of know-it-alls, catalyzed by a social media engine that brings these forces together.
From Washington Post ● Jan. 26, 2022
“I don’t think Raven actually hid this book. She’s probably one of those know-it-alls who likes to flaunt every fact in her head. Yippee for you, you know a lot about Edgar Allan Poe.”
From "Book Scavenger" by Jennifer Chambliss Bertman
