Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

preposterous

play
adjective pre·pos·ter·ous \pri-ˈpäs-t(ə-)rəs\

Simple Definition of preposterous

  • : very foolish or silly

Source: Merriam-Webster's Learner's Dictionary

Full Definition of preposterous

  1. :  contrary to nature, reason, or common sense :  absurd

preposterously adverb
preposterousness noun

Examples of preposterous in a sentence

  1. The whole idea is preposterous!

  2. <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

preposterous

play
adjective pre·pos·ter·ous \pri-ˈpä-stə-rəs\

Definition of preposterous for Students

  1. :  making little or no sense :  foolish <a preposterous excuse>





Seen and Heard

What made you want to look up preposterous? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a smart aleck

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

maudlin prompt angry oily
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ