irrationality
Americannoun
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the quality or condition of being irrational.
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an irrational, illogical, or absurd action, thought, etc.
noun
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the state or quality of being irrational
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irrational thought, action, or behaviour
Etymology
Origin of irrationality
First recorded in 1560–70; irrational + -ity
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Bennett argued presciently that by kowtowing to radicals, “a great university was brought low by the very forces which modern universities came into being to oppose: ignorance, irrationality and intimidation.”
From The Wall Street Journal • Feb. 17, 2026
But Panamanian President Jose Raul Mulino said Sunday that "there is no justification whatsoever for the barbarity committed," calling it "an unforgivable act of irrationality."
From Barron's • Dec. 28, 2025
It’s simply a matter of taking advantage of structural market irrationality.
From MarketWatch • Dec. 26, 2025
Through the animal’s point of view, De Los Santos Arias considers the enduring grip of colonialism and the consequences of human irrationality.
From Los Angeles Times • Dec. 22, 2025
In the back of my mind lingered an awareness of the hideous irrationality of this situation, but at the forefront, there was only blind terror.
From "The City Beautiful" by Aden Polydoros
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
