adjective Pertaining to, or performed by, the intellect; mental or cognitive.
intellectual powers, activities, etc.
adjective Endowed with intellect; having a keen sense of understanding; having the capacity for higher forms of knowledge or thought; characterized by intelligence or cleverness
an intellectual person
adjective Suitable for exercising one's intellect; perceived by the intellect
intellectual employments
adjective Relating to the understanding; treating of the mind.
intellectual philosophy, sometimes called "mental" philosophy
adjective Spiritual.
noun An intelligent, learned person, especially one who discourses about learned matters.
noun The intellect or understanding; mental powers or faculties.