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Definition of: preposterous
(pri·pos′tər·əs) adjective
Contrary to nature, reason, or common sense; strikingly or utterly absurd or impracticable. See synonyms under ABSURD, EXTRAORDINARY, RIDICULOUS. [<L praeposterus the last first, inverted <prae- before + posterus last]
—pre·pos′ter·ous·ly adverb
—pre·pos′ter·ous·ness noun
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