Noumenon

[Sarah]

The of itself unknown and unknowable rational object, or thingin itself, which is distinguished from the Ant: phenomenon throughwhich it is apprehended by the senses, and by which it is interpretedand understood; -- so used in the philosophy of Kant and hisfollowers.

[Sarah]

A word widely used by the great philosopher Immanuel Kant. Kant refers to the distinction between phenomenon and noumenon as one of the most important distinctions in philosophy. The distinction is between the apparent world of sensible phenomena and the intelligible invisible world of Reality.