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Word of the Day Tuesday, June 9, 2026

irrational

/ɪˈræʃənəl/ adjective · British & US
Valid in UKValid in US
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What does irrational mean?

adjective

Lacking a rational or logical basis; unreasonable or absurd. Not able to be expressed as a rational number.

Example

"The artist's irrational use of color added to the painting's emotional impact."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for irrational

Antonyms of irrational

Rhymes with irrational

Etymologically related