plural flounder or flounders
Synonyms of flounder
: flatfish
especially : any of various marine fishes (families Pleuronectidae, Paralichthyidae, and Bothidae) that include important food fishes

flounder

2 of 2

verb

intransitive verb

1
: to struggle to move or obtain footing : thrash about wildly
The poor horse was floundering in the mud.
2
: to proceed or act clumsily or ineffectually
… the normally surefooted governor floundered a moment like a prize pupil caught unprepared.—Time

Did you know?

There’s nothing fishy about flounder... the verb, that is. While the noun referring to a common food fish is of Scandinavian origin, the verb flounder, which dates to the late 16th century, is likely an alteration of an older verb, founder. The two verbs have been confused ever since. Today, founder is most often used as a synonym of fail, or, in contexts involving a waterborne vessel, as a word meaning “to fill with water and sink.” Formerly, it was also frequently applied when a horse stumbled badly and was unable to keep walking. It’s likely this sense of founder led to the original and now-obsolete meaning of flounder: “to stumble.” In modern use, flounder typically means “to struggle” or “to act clumsily”; the word lacks the finality of founder, which usually suggests complete collapse or failure, as that of a sinking ship.

Examples of flounder in a Sentence

Verb The horses were floundering through the deep snow. He was floundering around in the pool like an amateur. After watching me flounder for a few minutes, my instructor took over.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
The New York Mets handed Andy Green a three-year contract on Tuesday, removing his interim tag and delivering a giant middle finger to a fan base that spent all summer watching a $300 million roster flounder. — Alejandro Avila Outkick, FOXNews.com, 22 Sep. 2026 Dinner options include Prime brisket with collard greens, Sea Island red peas and the couple’s signature milk bread or a crispy NC flounder filet served with pomme purees and peekytoe crab butter. — Heidi Finley, Charlotte Observer, 16 Sep. 2026
Verb
And yet when Winston took over for Dart in Monday’s first quarter, and as the Giants’ offense floundered while falling behind big, Beckham was nailed to the bench. — Pat Leonard, New York Daily News, 25 Sep. 2026 The tech giants surged to all-time highs this week, a surprising show of strength given that the group has floundered for much of this year with the artificial intelligence trade broadening away from megacaps. — Sarah Min, CNBC, 24 Sep. 2026 See All Example Sentences for flounder

Word History

Etymology

Noun

Middle English, of Scandinavian origin; akin to Norwegian flundra flounder

Verb

probably alteration of founder

First Known Use

Noun

15th century, in the meaning defined above

Verb

1592, in the meaning defined at sense 1

Time Traveler
The first known use of flounder was in the 15th century

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Cite this Entry

“Flounder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flounder. Accessed 27 Sep. 2026.

Kids Definition

flounder

1 of 2 noun
plural flounder or flounders
: flatfish
especially : any of various important marine food fishes

flounder

2 of 2 verb
: to struggle or go clumsily
floundering through the deep snow
Etymology

Noun

Middle English flounder "a flatfish"; of Scandinavian origin

Verb

probably an altered form of founder

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