ir·ra·tion·al [ih-rash-uh-nl](previously 07-03-13)
1. without the faculty of reason; deprived of reason.
2. without or deprived of normal mental clarity or sound judgment.
3. not in accordance with reason; utterly illogical: irrational arguments.
4. not endowed with the faculty of reason: irrational animals.
a. (of a number) not capable of being expressed exactly as a ratio of two integers.
b. (of a function) not capable of being expressed exactly as a ratio of two polynomials.
6. Algebra. (of an equation) having an unknown under a radical sign or, alternately, with a fractional exponent.
7. Greek and Latin Prosody.
a. of or pertaining to a substitution in the normal metrical pattern, especially a long syllable for a short one.
b. noting a foot or meter containing such a substitution.
8. Mathematics, irrational number.
OTHER WORDS FROM IRRATIONAL
non·ir·ra·tion·al, adjective, noun
WORDS RELATED TO IRRATIONAL
insane, crazy, stupid, incoherent, unreasonable, preposterous, unsound, wrong, ridiculous, absurd, unwise, foolish, aberrant, wild, loony, raving, silly, invalid, brainless, delirious
SYNONYMS FOR IRRATIONAL
See synonyms for: irrational / irrationally on Thesaurus.com
3. unreasonable, ridiculous; insensate.
Origin: 1425–75; late Middle English < Latin irrationalis. See ir- , rational
EXAMPLE SENTENCES FROM THE WEB FOR IRRATIONAL
You have to strike a balance where you’re not telling people that what they’re saying is irrational, silly, crazy.
MOBILIZING THE NATIONAL GUARD DOESN’T MEAN YOUR STATE IS UNDER MARTIAL LAW. USUALLY.|BY LOGAN JAFFE|SEPTEMBER 17, 2020|PROPUBLICA
It’s possible that today’s market is an indication of things to come, where fundamentals play a larger part in valuations, as opposed to the irrational exuberance that has persisted in recent months within tech.
JITTERY INVESTORS EYE TODAY’S BIG JOBS REPORT AS MARKETS REBOUND FROM AN EPIC SELL-OFF|BERNHARD WARNER|SEPTEMBER 4, 2020|FORTUNE
John Coates, a Wall Street trader turned neuroscientist, considers the molecule of “irrational exuberance” in The Hour Between Dog and Wolf.
THE BEST BOOKS, JOURNALISTS, AND ACADEMICS FOR KEEPING UP WITH BUBBLES AND TRADING|JOHN DETRIXHE|AUGUST 30, 2020|QUARTZ
Primarily, this problem is a byproduct of “irrational exuberance” in the early 2000s and the use of public sector banks by successive governments to propel the economy.
THE MODI GOVERNMENT’S PLAN TO OVERCOME ECONOMIC SLUMP IGNORES A BITTER LESSON FROM THE PAST|PRATHAMESH MULYE|AUGUST 18, 2020|QUARTZ
Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.