英和和英

語源

From irrational +‎ -ity. May also be analyzed as ir- +‎ rationality.

発音

• (米国発音) IPA: /ɪˌɹæʃ.əˈnæl.ə.ti/, /ɪˌɹæʃ.ɪˈnæl.ɪ.ti/, /əˌɹæʃ.əˈnæl.ə.ti/
• 韻: -ælɪti

名詞

irrationality (countable and uncountable, plural irrationalities)

1. (uncountable) The quality or state of being irrational.
   1. The state of being illogical or absurd.

      Synonyms: absurdity, illogicality, fallaciousness

   2. (mathematics) The property of being an irrational number.
   3. The state of being incapable of reason or abstract thought.

      Synonyms: unreason, mindlessness

      • 1905, Leo Tolstoy, The Complete Works of Count Tolstoy, page 523:

        Man introduces reason into the world of Nature, destroying irrational struggle and waste. But this activity is outside of self, distant, only reflected. Man sees this irrationality only with his intellect.

2. (countable) Something that is irrational; the result of an illogical or absurd thought or action.

   Synonym: absurdity

反意語

• rationality

参照

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “irrationality”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “irrationality”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.