Irrational(a.) Not rational; void of reason or understanding; as, brutes are irrational animals.
Irrational(a.) Not according to reason; absurd; foolish.
Irrational(a.) Not capable of being exactly expressed by an integral number, or by a vulgar fraction; surd; -- said especially of roots. See Surd.
Irrationality(n.) The quality or state of being irrational.
Irrationally(adv.) In an irrational manner.
Words within irrationalities