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Thesaurus: preposterous

Having that first which ought to be last; inverted in order.

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  1. a. Having that first which ought to be last; inverted in order.
  2. a. Contrary to nature or reason; not adapted to the end; utterly and glaringly foolish; unreasonably absurd; perverted.
  3. adj. so unreasonable as to invite derision
  4. 1. Having that first which ought to be last; inverted in order. [Obs.] The method I take may be censured as preposterous, because I thus treat last of the antediluvian earth, which was first in the order of nature. Woodward. 2. Contrary to nature or reason; not adapted to the end; utterly and glaringly foolish; unreasonably absurd; perverted. "Most preposterous conclusions." Shak. Preposterous ass, that never read so far! Shak. Syn. -- Absurd; perverted; wrong; irrational; foolish; monstrous. See Absurd. -- Pre*pos"ter*ous*ly, adv. -Pre*pos"ter*ous*ness, n.
  5. j:100 s incongruous; inviting ridicule