1 ultrarational | Definition of ultrarational
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ultrarational

adjective
ul·​tra·​ra·​tio·​nal | \ ˌəl-trÉ™-ˈrash-nÉ™l How to pronounce ultrarational (audio) , -ˈra-shÉ™-nᵊl\

Definition of ultrarational

: extremely rational or reasonable an ultrarational decision ultrarational theories

First Known Use of ultrarational

1894, in the meaning defined above

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