Definitions

irrational

[ih-rash-uh-nl, -rash-nl] / ɪˈræʃ ə nl, -ˈræʃ nl /

ADJECTIVE

illogical, senseless

Synonyms

STRONGEST

aberrant absurd crazy foolish incoherent insane preposterous ridiculous stupid unreasonable unsound unwise wrong

STRONG

invalid loony raving silly wild

WEAK

brainless cockamamie delirious demented disconnected disjointed distraught fallacious flaky freaky injudicious kooky mad mindless nonsensical nutty off-the-wall reasonless sophistic specious unreasoning unstable unthinking wacky

Antonyms

STRONGEST

balanced logical rational realistic reasonable responsible sane sensible serious smart sound thoughtful well wise

WEAK

reflective stable

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.

So successful was he at it that NBC recently turned one of his books into a whole TV show, a detective thriller called The Irrational whose main character is loosely based on Ariely himself.

From Slate • Oct. 23, 2023

Irrational numbers include, for example, the square root of 2, whose decimal representation is infinite without ever repeating.

From Scientific American • May 23, 2023

It is based not just on extreme authority and emotionalism, but a cultivation and worship of the Irrational.

From Salon • Apr. 20, 2023

Irrational money also built Netflix into an entertainment titan, and now Amazon and Apple are throwing their cash around, too.

From Seattle Times • Apr. 4, 2022

Conceive me then at the writing of The Irrational Knot as a person neither belonging to the world I describe nor wholly ignorant of it, and on certain points quite incapable of conceiving it intuitively.

From The Irrational Knot Being the Second Novel of His Nonage by Shaw, Bernard

Vocabulary lists containing irrational

Pi Day Vocabulary

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The Number System

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Divergent

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