non·​ra·​tio·​nal ˌnän-ˈrash-nəl How to pronounce nonrational (audio)
: not based on, guided by, or employing reason : not rational : irrational
nonrational beliefs
nonrational behavior
… anthropological history exploring such nonrational aspects of society as mating customs and eating habits.Gertrude Himmelfarb
mathematics : not relating to or being a rational number : irrational
nonrational numbers

Word History

First Known Use

1859, in the meaning defined at sense 1

Time Traveler
The first known use of nonrational was in 1859

Dictionary Entries Near nonrational

Cite this Entry

“Nonrational.” Dictionary, Merriam-Webster, Accessed 15 Apr. 2024.

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