dictionary help| irrational | medical dictionary |
1. Not rational; void of reason or understanding; as, brutes are irrational animals.
2. Not according to reason; absurd; foolish. "It seemed utterly irrational any longer to maintain it." (I. Taylor)
3. <mathematics> Not capable of being exactly expressed by an integral number, or by a vulgar fraction; surd; said especially of roots. See Surd.
Synonyms: Absurd, foolish, preposterous, unreasonable, senseless. See Absurd.
Origin: L. Irrationalis: cf. F. Irrationnel. See In- not, and Rational.
(01 Mar 1998)
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