Definition of: Cartesian

(kär·tē′zhən) adjective
Of or pertaining to René Descartes, a French philosopher and geometer of the 17th century, or to his doctrines and methods.
—noun A follower of Descartes, or believer in his doctrines. [<NL Cartesianus <Cartesius, Latinized form of Descartes]
—Car·te′sian·ism noun