preposterous
Americanadjective
adjective
Related Words
See absurd.
Other Word Forms
- preposterously adverb
- preposterousness noun
- unpreposterous adjective
- unpreposterously adverb
- unpreposterousness noun
Etymology
Origin of preposterous
First recorded in 1535–45; from Latin praeposterus “inverted, reversed, perverted, perverse,” literally, “with the rear part first”; see also pre-, posterior, -ous
Explanation
To a vegetarian, the idea of eating a 52-ounce T-bone steak would seem preposterous — absolutely absurd. When the word preposterous was first used, it meant reversing the normal order of things — putting what was last first, and vice versa. Imagine putting on your underwear over your pants and you'll see that there's a kind of absurdity in something that's backwards, which is why preposterous came to mean "ridiculous." The word is often used as part of an exclamation: a chef who is asked to cook with nothing but jelly beans might exclaim, "That's preposterous!"
Vocabulary lists containing preposterous
Holes
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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.
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
He has entered 2026 with perhaps 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. 10, 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
“I do believe that you are encouraging these preposterous people.”
From "A Confederacy of Dunces" by John Kennedy Toole
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
