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Word Crow » I » I-81 » irrational
\Ir*ra"tion*al\, a. [L. irrationalis: cf. F.
irrationnel. See {In-} not, and {Rational}.]
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. (Math.) Not capable of being exactly expressed by an
integral number, or by a vulgar fraction; surd; -- said
especially of roots. See {Surd}.
Syn: Absurd; foolish; preposterous; unreasonable; senseless.
See {Absurd}.
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