noun

1. An intelligent, learned person, especially one who discourses about learned matters.

2. The intellect or understanding; mental powers or faculties.

Synonyms: highbrow

adjective

1. Belonging to, or performed by, the intellect; mental or cognitive.

   “intellectual powers, activities, etc.”

2. Endowed with intellect; having the power of understanding; having capacity for the higher forms of knowledge or thought; characterized by intelligence or mental capacity

   “an intellectual person”

3. Suitable for exercising the intellect; formed by, and existing for, the intellect alone; perceived by the intellect

   “intellectual employments”