[ pri-pos-ter-uhs, -truhs ]
/ prɪˈpɒs tər əs, -trəs /


completely contrary to nature, reason, or common sense; absurd; senseless; utterly foolish: a preposterous tale.

Origin of preposterous

First recorded in 1535–45, preposterous is from the Latin word praeposterus with the hinder part foremost. See pre-, posterior, -ous

OTHER WORDS FROM preposterous

synonym study for preposterous

See absurd. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for preposterously

British Dictionary definitions for preposterously

/ (prɪˈpɒstərəs) /


contrary to nature, reason, or sense; absurd; ridiculous

Derived forms of preposterous

preposterously, adverbpreposterousness, noun

Word Origin for preposterous

C16: from Latin praeposterus reversed, from prae in front, before + posterus following
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012