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.

Preposterous really, how it never even crossed my mind.

From Salon • Apr. 10, 2025

Preposterous, adjective: from the Latin prae-, meaning “before,” and posterus, or “coming after.”

From New York Times • Apr. 20, 2023

Everything from Toni Morrison’s “Beloved” to Dav Pilkey’s “Captain Underpants and the Preposterous Plight of the Purple Potty People” is being consigned to the metaphorical fire.

From Seattle Times • Feb. 6, 2022

Preposterous, but there was good in those days, there was love and laughter.

From Slate • May 13, 2020

Miss Moberly shows the same nice skill In sketching character in 'Hope, my Wife' as in her earlier novel, 'That Preposterous Will.'

From First Person Paramount by Pratt, Ambrose

Vocabulary lists containing preposterous

Holes

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