CosmotheticCos`mo*thet"ic\ (k?z`m?-th?t"?k), a. [Gr. ko`smos universe + ??? to place or arrange.] (Metaph.) Assuming or positing the actual existence or reality of the physical or external world. Cosmothetic idealists (Metaph.), those who assume, without attempting to prove, the reality of external objects as corresponding to, and being the ground of, the ideas of which only the mind has direct cognizance. The cosmothetic idealists . . . deny that mind is immediately conscious of matter. --Sir W. Hamilton.