Simple Definition of preposterous
: very foolish or silly
Full Definition of preposterous
: contrary to nature, reason, or common sense : absurd
Examples of preposterous in a sentence
The whole idea is preposterous!
<the idea that extraterrestrials built the pyramids is preposterous>
Origin of preposterous
Latin praeposterus, literally, in the wrong order, from prae- + posterus hinder, following — more at posterior
First Known Use: 1542
PREPOSTEROUS Defined for Kids
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Thesaurus: All synonyms and antonyms for "preposterous" Spanish Central: Translation of "preposterous" Nglish: Translation of "preposterous" for Spanish speakers Britannica English: Translation of "preposterous" for Arabic speakers
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