ratio existendin.
/ˈreɪʃɪəʊ ˌɛɡzᵻˈstɛndʌɪ/, /ˈrɑːtɪəʊ ˌɛɡzɪˈstɛndi/, U.S. /ˈreɪʃioʊ ˌɛɡzəˈstɛndaɪ/, /ˈrædioʊ ˌɛɡzɪˈstɛndi/ Philosophy.
= ratio essendi n.
ΘΚΠ
the mind > mental capacity > philosophy > metaphysics > ontology > [noun] > being or entity > that in virtue of which something exists
ratio essendi1830
ratio existendi1865
1865 S. H. Hodgson Time & Space vii. 488 Now both the cause, or ratio existendi, and the reason, or ratio cognoscendi, in every particular case must be given by actual experience.
1890 W. James Princ. Psychol. I. x. 337 But if the brand is the ratio cognoscendi of the belonging, the belonging, in the case of the herd, is in turn the ratio existendi of the brand.
1964 H. Nakamura Ways of Thinking Eastern Peoples (rev. ed.) 32 What is the existential basis (ratio existendi,..) which brings about the differences in ways of thinking among nations?
2005 L. May Crimes against Humanity ii. 36 A religious doctrine does not lose its ratio existendi by the fact of being adhered to by only some people.
This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).
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n.1865