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unreasonable definition


This page has two definitions of unreasonable in English. Unreasonable is an adjective. Also define these 3 related words and terms: reason, unreasoning, and reasonable.



From un- +‎ reason +‎ -able.


  • IPA(key): /ʌnˈɹiːz(ə)nəbl̩/
  • (file)
  • Hyphenation: un‧rea‧son‧able


unreasonable (comparative more unreasonable, superlative most unreasonable)

  1. Without the ability to reason; unreasoning.
    • c. 1594, William Shakespeare, Romeo and Juliet, Act III, Scene 3,[1]
      Hold thy desperate hand:
      Art thou a man? thy form cries out thou art:
      Thy tears are womanish; thy wild acts denote
      The unreasonable fury of a beast:
      Unseemly woman in a seeming man!
    • Unreasoning definition
      Behaving without reason.
  2. Not reasonable; going beyond what could be expected or asked for.
    Antonym: reasonable

Derived terms