foolishness
Americannoun
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lack of wisdom or good judgment; foolish quality.
Oh, the foolishness of thinking that wealth brings happiness!
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foolish talk, ideas, or behavior.
How could someone with such a clever mind as yourself talk such foolishness?
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a foolish act, error, habit, etc..
Shakespeare, who looks at all men as if from Mount Olympus, notes their foibles and foolishnesses, and yet smiles on them all.
Other Word Forms
- overfoolishness noun
- unfoolishness noun
Etymology
Origin of foolishness
Explanation
Foolishness is nonsense or stupidity; it's acting in a way that is silly or irrational. Throwing a temper tantrum because the lunch line is moving slowly is pure foolishness — your outburst won't make the line move any faster. When your actions show a lack of good sense or solid judgement, you're betraying your foolishness. Impulsively jumping off the garage roof into a pile of leaves is evidence of your foolishness. We can trace this word's origin back to fool and the Old French fol, "idiot," and also "blacksmith's bellows," from a root meaning "blow or swell."
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.
Mr. Clooney has never had a better role, and he burrows deeply into it with a self-interrogating combination of narcissism, foolishness, bravado and charisma.
From The Wall Street Journal • Nov. 13, 2025
Diomande's act of foolishness just put the tin hat on it.
From BBC • Sep. 25, 2025
The Lakers were, again, the Lakers — the version from early this season that made optimism seem nothing like foolishness.
From Los Angeles Times • Dec. 16, 2024
It’s our responsibility, then, to rectify this foolishness and shed light on the ways in which Los Angeles influences fashion.
From Los Angeles Times • Jul. 31, 2024
A man whom she believed to be Bryan shouted, “Stop your foolishness, Annie, and get into this car.”
From "Killers of the Flower Moon" by David Grann
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
