ultrarational

adjective
ul·​tra·​ra·​tio·​nal | \ ˌəl-trə-ˈrash-nəl How to pronounce ultrarational (audio) , -ˈra-shə-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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The first known use of ultrarational was in 1894

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