- (of a number) not capable of being expressed exactly as a ratio of two integers.
- (of a function) not capable of being expressed exactly as a ratio of two polynomials.
- of or relating to a substitution in the normal metrical pattern, especially a long syllable for a short one.
- noting a foot or meter containing such a substitution.
- irrational number,
Origin of irrational
Examples from the Web for irrational
The fact that the virus is still alive has sustained many safety concerns, both rational and irrational, about its use.Powdered Measles Vaccine Could Be Huge for Developing World|Kent Sepkowitz|December 2, 2014|DAILY BEAST
To a certain degree, there is an irrational sense of betrayal.Renee Zellweger's Face Gets More Medical Scrutiny Than Ebola|Emily Shire|October 21, 2014|DAILY BEAST
But with no sign of an epidemic in the U.S. it seems, at the very least, irrational.
One of the reasons the Vikings are viewed so negatively is that their violence could seem wanton or irrational.How the Vikings Saved Europe and Got a Terrible Reputation|William O’Connor|September 17, 2014|DAILY BEAST
I must confess to a fugitive and irrational wish that he might find some small mercies there.Tupac and Murray Kempton: The Godfather Who Wore Tweed|Michael Daly|June 22, 2014|DAILY BEAST
There is irrational behavior that I have been guilty of many times.Warren Commission (5 of 26): Hearings Vol. V (of 15)|The President's Commission on the Assassination of President Kennedy
Do we not mean that the thing appears to us irrational, and we want it shown that it is rational?A Critical History of Greek Philosophy|W. T. Stace
I do not conclude that it is irrational to take measures for perpetuating the existing European order.The Great Illusion|Norman Angell
But its wild, irrational career of destruction through the ages now was over.Astounding Stories, July, 1931|Various
Vain and irrational as was the early form of this anticipation, it was not without advantage.Charles Sumner; his complete works; Volume 2 (of 20)|Charles Sumner
- not rational
- (as noun)an irrational
- of or relating to a metrical irregularity, usually the occurrence of a long syllable instead of a short one
- denoting a metrical foot where such an irregularity occurs
late 15c., "not endowed with reason" (of beats, etc.); earlier (of quantities) "inexpressible in ordinary numbers" (late 14c.); from Latin irrationalis "without reason," from assimilated form of in- "not, opposite of" (see in- (1)) + rationalis "reason" (see rational). Meaning "illogical, absurd" is attested from 1640s. Related: Irrationally.