Definitions

preposterous

[pri-pos-ter-uhs, -truhs] / prɪˈpɒs tər əs, -trəs /

ADJECTIVE

ridiculous, bizarre

Synonyms

STRONGEST

absurd crazy excessive fantastic foolish impossible incredible insane irrational laughable ludicrous nonsensical outrageous senseless shocking silly stupid unbelievable unreasonable unthinkable

WEAK

asinine exorbitant extravagant extreme far-out harebrained monstrous out of the question taking the cake thick too much unusual wacky wild

Antonyms

STRONGEST

bad balanced believable credible good intelligent logical plain plausible poor possible practical rational realistic reasonable responsible sane sensible serious smart sound tenable wise

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.

Murray will be remembered for his razor-sharp volleying skills and the preposterous angles he conjured at the net.

From BBC • Apr. 15, 2026

It’s preposterous to think that, even with the best of intentions on both sides, a peace as complicated as this could have been settled in one day.

From Slate • Apr. 13, 2026

Watch as the fluid camerawork makes her kills look nastier, and the preposterous script allows her to outwit her foes, even with the cards stacked against her at every turn.

From Salon • Mar. 29, 2026

Written by Matthew Parkhill, with Guy Ritchie — who directed Robert Downey Jr. in two steroidal Holmes films — helming some episodes, it’s pulpy and nutty and preposterous, mostly in a good way.

From Los Angeles Times • Mar. 3, 2026

The least likely choice, and the less costly one, is the most preposterous hat I’ve ever seen.

From "Woe Is I" by Patricia T. O'Conner

Vocabulary lists containing preposterous

Holes

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"The Hunger Games" Vocabulary from Chapter 1

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100 SAT words Beginning with "P"

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