blunder
Americannoun
verb (used without object)
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to move or act blindly, stupidly, or without direction or steady guidance.
Without my glasses I blundered into the wrong room.
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to make a gross or stupid mistake, especially through carelessness or mental confusion.
Just pray that he doesn't blunder again and get the names wrong.
verb (used with object)
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to bungle; botch.
Several of the accounts were blundered by that new assistant.
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to utter thoughtlessly; blurt out.
He blundered his surprise at their winning the award.
noun
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a stupid or clumsy mistake
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a foolish tactless remark
verb
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to make stupid or clumsy mistakes
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to make foolish tactless remarks
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to act clumsily; stumble
he blundered into a situation he knew nothing about
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(tr) to mismanage; botch
Related Words
See mistake.
Other Word Forms
- blunderer noun
- blundering noun
- blunderingly adverb
- nonblundering adjective
- nonblunderingly adverb
- outblunder verb (used with object)
- superblunder noun
- unblundering adjective
Etymology
Origin of blunder
First recorded in 1350–1400; Middle English blunderen, blondren (verb), from Old Norse blunda “to shut one's eyes, nap”; compare Norwegian dialect blundra
Explanation
A blunder is an embarrassing mistake. Accidentally called your new boyfriend by your old boyfriend's name? Ouch. That's a blunder you don't want to repeat. Has an embarrassing mistake ever made you feel like you’re stumbling around with your eyes closed? If so, it won’t surprise you to learn that blunder comes from the Old Norse word blundra, meaning to “shut one's eyes.” It wasn’t until the eighteenth century that blunder came to refer to a stupid or embarrassing mistake, or as a verb, to describe making such a mistake, as in “I tend to blunder when I'm nervous.”
Vocabulary lists containing blunder
"The Necklace" by Guy de Maupassant
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100 SAT Words Beginning with "B"
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English Words Derived from Old Norse
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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.
But it now appears this was a perfunctory review intended to give Drs. Prasad and Makary cover for their initial blunder in rejecting the drug.
From The Wall Street Journal • Apr. 14, 2026
Is it a PR strategy, or another business blunder?
From Slate • Apr. 10, 2026
Maybe not switching sooner was a blunder, but you are on the right track to correcting that.
From MarketWatch • Mar. 18, 2026
The blunder was first reported by tech news outlet Bleeping Computer, which said it had seen a service alert confirming the issue.
From BBC • Feb. 19, 2026
I know the unspoken rules of boys, but with girls I sense that I am always on the verge of some unforeseen, calamitous blunder.
From "Cat's Eye" by Margaret Atwood
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.
