blunder

1 of 2

verb

blun·​der ˈblən-dər 

blundered; blundering ˈblən-d(ə-)riŋ 

intransitive verb

1

: to move unsteadily or confusedly

In their exhaustion they often blundered against each other …

—Norman Mailer

2

: to make a mistake through stupidity, ignorance, or carelessness

blundered by not acting sooner

transitive verb

1

: to utter stupidly, confusedly, or thoughtlessly

blundered an apology

2

: to make a stupid, careless, or thoughtless mistake in

… blundering matters through ignorance …

—Rafael Sabatini

blunderer

ˈblən-dər-ər 

noun

blunder

2 of 2

noun

: a gross error or mistake resulting usually from stupidity, ignorance, or carelessness

a costly tactical blunder

Synonyms of blunder

Verb

• fumble
• stumble
• trip
• mistake

Noun

• mistake
• error

Choose the Right Synonym for blunder

error, mistake, blunder, slip, lapse mean a departure from what is true, right, or proper.

error suggests the existence of a standard or guide and a straying from the right course through failure to make effective use of this.

procedural errors

mistake implies misconception or inadvertence and usually expresses less criticism than error.

dialed the wrong number by mistake

blunder regularly imputes stupidity or ignorance as a cause and connotes some degree of blame.

diplomatic blunders

slip stresses inadvertence or accident and applies especially to trivial but embarrassing mistakes.

a slip of the tongue

lapse stresses forgetfulness, weakness, or inattention as a cause.

a lapse in judgment

Examples of blunder in a Sentence

Verb

We blundered along through the woods until we finally found the trail.

Another skier blundered into his path.

The government blundered by not acting sooner.

Noun

The accident was the result of a series of blunders.

fixed a minor blunder in the advertising flyer

Recent Examples on the Web

Verb

Padres fielders blundered in three of his outings. —Tom Krasovic, San Diego Union-Tribune, 17 Apr. 2026

People see this president as having blundered into a war with no clear rationale. —NBC news, 5 Apr. 2026

Noun

Korda could only laugh at her blunder on the final hole that kept her from matching or surpassing her largest margin of victory, set last week with her five-shot win in Houston at a major. —ABC News, 3 May 2026

Trump previously committed a similar blunder when meeting Queen Elizabeth II in 2018. —Stylecaster Editors, StyleCaster, 30 Apr. 2026

Word History

Etymology

Verb

Middle English blundren, probably of Scandinavian origin; akin to Old Norse blunda to shut one's eyes, doze, Norwegian dialect blundra

Noun

noun derivative of blunder entry 1

First Known Use

Verb

14th century, in the meaning defined at intransitive sense 1

Noun

1681, in the meaning defined above

Rhymes for blunder

• bunder
• funder
• plunder
• sunder
• thunder
• under
• asunder

Kids Definition

blunder

1 of 2 verb

blun·​der ˈblən-dər 

blundered; blundering -d(ə-)riŋ 

1

: to move unsteadily or blindly

2

: to make a mistake (as through stupidity or carelessness)

3

: to say stupidly or thoughtlessly : blurt

blunderer

-dər-ər 

noun

blunder

2 of 2 noun

: a bad or stupid mistake