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irrational

Pronunciation: /ɪˈɹæʃ.(ə.)nəl/

The English word “irrational” has 3 meanings listed here.

adjective

  1. Not rational; unfounded, nonsensical or wrong-headed.
  2. Of a real number, that cannot be written as the ratio of two integers.

noun

  1. A real number that can not be expressed as the quotient of two integers, an irrational number.

Etymology

From Latin irratiōnālis, from ir- + ratiōnālis.

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