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Agency Dictionary

Preposterous

adjectivePronunciation: /prɪˈpɒs.tər.əs/

In Portuguese: Absurdo

What does “Preposterous” mean?

Contrary to reason or common sense, utterly absurd or ridiculous.

Etymology

From Latin praeposterus (with the hinder part before, reversed, inverted), from prae (before) and posterus (coming after, from post). The Latin adjective described something in which the natural order is inverted, and the sense extended to anything contrary to reason or common sense.

Usage note

Preposterous is stronger than absurd: it implies that something is so contrary to reason that it is almost comical. The Latin origin (hind part before) is not felt by modern users.

Synonyms

  • absurd
  • ridiculous
  • ludicrous
  • outrageous
  • nonsensical

Word family

  • preposterously
  • preposterousness

Source editions

Where this entry comes from in the Agency editorial.

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Also from these editions: concepts

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Cite this entry

“Preposterous”. Agency Wiki, Agency Brasil. Published on November 11, 2026. https://www.agencybrasil.com/en/wiki/dictionary/preposterous