ETYM Latin irrationalis: cf. French irrationnel. Related to In- not, and Rational.
1. Not consistent with or using reason.
2. (Math) Real but not expressible as the quotient of two integers.
Alle Lehren, die das I.e zu umgrenzen u. zur Geltung zu bringen suchen; Ggs.: Rationalismus.
1. An irrational being
2. Irrational number