cogito

noun
co·​gi·​to | \ ˈkä-gi-ˌtō How to pronounce cogito (audio) , ˈkō- How to pronounce cogito (audio) , ˈkä-ji- How to pronounce cogito (audio) \

Definition of cogito

1 : the philosophical principle that one's existence is demonstrated by the fact that one thinks
2 : the intellectual processes of the self or ego

First Known Use of cogito

1838, in the meaning defined at sense 1

History and Etymology for cogito

New Latin cogito, ergo sum, literally, I think, therefore I am, principle stated by René Descartes

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The first known use of cogito was in 1838

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