1 nonrational | Definition of nonrational
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nonrational

adjective
non·​ra·​tio·​nal | \ ËŒnän-ˈrash-nÉ™l How to pronounce nonrational (audio) , -ˈra-shÉ™-nᵊl\

Definition of nonrational

1 : 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
2 mathematics : not relating to or being a rational number : irrational nonrational numbers

First Known Use of nonrational

1859, in the meaning defined above

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Thesaurus: All synonyms and antonyms for nonrational

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