irrational

adjectivenounattested in dialogue

//ɪˈɹæʃ.(ə.)nəl//

Not rational; unfounded, nonsensical or wrong-headed.

adjective

1
Not rational; unfounded, nonsensical or wrong-headed.
an irrational decision
July 18, 2012, Scott Tobias, AV Club The Dark Knight Riseshttp://www.avclub.com/articles/the-dark-knight-rises-review-batman,82624/ Where the Joker preys on our fears of random, irrational acts of terror, Bane has an all-consuming, dictatorial agenda that’s more stable and permanent, a New World Order that’s been planned out with the precision of a military coup.
2
Of a real number, that cannot be written as the ratio of two integers.
The number π is irrational.

Etymology

From Latin irratiōnālis, from ir- + ratiōnālis.

noun

1
A real number that can not be expressed as the quotient of two integers, an irrational number.
The square root of 2, which was the first irrational to be discovered, was known to the early Pythagoreans, and ingenious methods of approximating to its value were discovered.

Forms

plural: irrationals
comparative: more irrational
superlative: most irrational

irons · A lack of forward motion.Irons · A surname.irony · The quality of a statement that, when taken in context, may…

irrational · Not rational; unfounded, nonsensical or wrong-headed.

irregular · Nonstandard; not conforming to rules or expectations.irrelevant · Not relevant, as irresistible · Impossible to resist.

The neighbouring pages — Alphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.