irrational

Definition from Wiktionary, the free dictionary
Jump to: navigation, search

English[edit]

Etymology[edit]

From Latin irratiōnālis, from ir- + ratiōnālis.

Pronunciation[edit]

  • enPR: ĭră'sh(ə)nəl, IPA(key): /ɪˈræʃ.(ə.)nəl/

Adjective[edit]

irrational (comparative more irrational, superlative most irrational)

  1. Not rational; unfounded or nonsensical.
    an irrational decision
    • July 18 2012, Scott Tobias, AV Club The Dark Knight Rises[1]
      Where the Joker preys on our fears of random, irrational acts of terror, Bane has an all-consuming, dictatorial agenda that’s more stable and permanent, a New World Order that’s been planned out with the precision of a military coup.
  2. (mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers.
    The number π is irrational.

Antonyms[edit]

Hyponyms[edit]

Derived terms[edit]

Translations[edit]

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.

Noun[edit]

irrational (plural irrationals)

  1. A real number that can not be expressed as the quotient of two integers, an irrational number.
    • 1946, Bertrand Russell, History of Western Philosophy, I.24:
      The square root of 2, which was the first irrational to be discovered, was known to the early Pythagoreans, and ingenious methods of approximating to its value were discovered.

Translations[edit]