preposterous

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UK:^*UK and possibly other pronunciationsUK and possibly other pronunciations/prɪˈpɒstərəs/

US:USA pronunciation: IPAUSA pronunciation: IPA/prɪˈpɑstərəs, -trəs/

US:USA pronunciation: respellingUSA pronunciation: respelling(pri pos′tər əs, -trəs)

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preposterous
WordReference English Thesaurus © 2025

Sense: Adjective: absurd

Synonyms:

absurd, ridiculous , outrageous , crazy , mindless, ludicrous , outlandish, batty (informal), barmy (UK, informal), cuckoo (informal), fanciful (informal), loony (informal), crackpot (informal), wacky (informal), hard to believe, inconceivable, senseless, silly , unthinkable, wild , out of the question

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Recent forum discussions about thesaurus entries:

（as） preposterous as it may sound - English Only forum
A preposterous suggestion... - English Only forum
ludicrous OR preposterous idea - English Only forum
ludicrous, preposterous and ridiculous - English Only forum
ridiculous ludicrous laughable absurd preposterous - English Only forum

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