Definition for IR-RA'TION-AL

IR-RA'TION-AL, a. [L. irrationalis; in and rationalis, from ratio.]

  1. Not rational; void of reason or understanding. Brutes are irrational animals.
  2. Not according to the dictates of reason; contrary to reason; absurd. To pursue a course of life which destroys happiness, is irrational.

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