Intellect

n.
  1. (Metaph.) The part or faculty of the human mind by which it knows, as distinguished from the power to feel and to will; the power to judge and comprehend; the thinking faculty; the understanding.
  2. The capacity for higher forms of knowledge, as distinguished from the power to perceive objects in their relations; mental capacity.
  3. A particular mind, especially a person of high intelligence; as, he was a great intellect.