brainless English
Adjective
( en adjective)
(lb) Having no brain.
(lb) Unintelligent, with little common sense.
*
*:"I don't mean all of your friends—only a small proportion—which, however, connects your circle with that deadly, idle, brainless bunch—the insolent chatterers at the opera, the gorged dowagers, the wornout, passionless men, the enervated matrons of the summer capital,!"

irrational English
Adjective
( en adjective)
Not rational; unfounded or nonsensical.
 an irrational decision
* July 18 2012 , Scott Tobias, AV Club The Dark Knight Rises [http://www.avclub.com/articles/thedarkknightrisesreviewbatman,82624/]
 Where the Joker preys on our fears of random, irrational acts of terror, Bane has an allconsuming, dictatorial agenda that’s more stable and permanent, a New World Order that’s been planned out with the precision of a military coup.
(mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers.
 The number π is irrational .
Antonyms
* (mathematics) rational
Hyponyms
* (mathematics) transcendental
Derived terms
* irrational number
* irrationality
* irrationalize
* irrationalization
Noun
( en noun)
A real number that can not be expressed as the quotient of two integers, an irrational number.
* 1946 , (Bertrand Russell), History of Western Philosophy , I.24:
 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.
