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Definition of blunder

blunder

/ˈblʌndɚ/
blun · der
Adverb:blunderingly
•
Plural:blunders
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Adjective:blundering
•
Past Simple:blundered
•
Past Participle:blundered
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Present Participle:blundering
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blunder Lexical Profile

blunder Game Scores & Validity

• noun

1

A stupid, careless, orgross mistake, typically made through ignorance, confusion, or lack of foresight.

Example

"Forgetting to back up the database before the system update was a costly blunder."

Synonyms
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Antonyms
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• verb

1

To make a stupid, careless, or serious mistake.

Example

"The negotiators blundered by revealing their maximum budget at the start of the meeting."

2

To move or act clumsily, blindly, or unsteadily.

Example

"We blundered through the dark hallway until we finally found the light switch."

Synonyms
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Antonyms
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• Rhymes for blunder

• Nearby Words

bluffer
bluing
bluish
blunder
blunderbuss
blunderer
blundering

Word Origin & Etymology

Originating in Middle English as 'blundren', the word is likely borrowed from an Old Norse source related to 'blunda' (meaning 'to shut one's eyes' or 'doze'), originally describing the act of stumbling around blindly before shifting to mean a careless mistake.

Cite this Entry

Wordmom. (2026). Definition of Blunder. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/blunder
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