(1):
(n.) The intellect or understanding; mental powers or faculties.
(2):
(a.) Relating to the understanding; treating of the mind; as, intellectual philosophy, sometimes called "mental" philosophy.
(3):
(a.) Suitable for exercising the intellect; formed by, and existing for, the intellect alone; perceived by the intellect; as, intellectual employments.
(4):
(a.) Endowed with intellect; having the power of understanding; having capacity for the higher forms of knowledge or thought; characterized by intelligence or mental capacity; as, an intellectual person.
(5):
(a.) Belonging to, or performed by, the intellect; mental; as, intellectual powers, activities, etc.