Definition of subrational in English:

subrational

adjective

  • 1Less than rational; without the faculty of reasoning.

  • 2Existing or occurring below the level of the rational.

Origin

Mid 19th century; earliest use found in The Daily Telegraph. From sub- + rational.

Pronunciation

subrational

/ˌsʌbˈraʃ(ə)n(ə)l//ˌsʌbˈraʃən(ə)l/