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.

The series is wildly atmospheric with plenty of gallows humor and more than a few truly loopy plotlines, but great fun with Davis managing, as ever, to sell even the most preposterous scene.

From Los Angeles Times • Jun. 8, 2026

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

But he has begun the season with his most preposterous goal yet: MLB’s best hitter also wants to be recognized as MLB’s best pitcher.

From The Wall Street Journal • Apr. 11, 2026

Three sprightly figures whirled madly in her head—hours filled with Uncle Jack and Dill dancing to preposterous measures blacked out the coming of tomorrow with tomorrow’s troubles.

From "Go Set a Watchman: A Novel" by Harper Lee

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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