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preposterous

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

Simple Definition of preposterous

  • : very foolish or silly

Full Definition of preposterous

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

pre·pos·ter·ous·ly adverb
pre·pos·ter·ous·ness noun

Examples of preposterous

  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



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