Source : Webster's Revised Unabridged Dictionary (1913)

Intellectual \In`tel*lec"tu*al\, n.
   The intellect or understanding; mental powers or faculties.

         Her husband, for I view far round, not nigh, Whose
         higher intellectual more I shun.         --Milton.

         I kept her intellectuals in a state of exercise. --De
                                                  Quincey.

Intellectual \In`tel*lec"tu*al\ (?; 135), a. [L. intellectualis:
   cf. F. intellectuel.]
   1. Belonging to, or performed by, the intellect; mental; as,
      intellectual powers, activities, etc.

            Logic is to teach us the right use of our reason or
            intellectual powers.                  --I. Watts.

   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;
      as, an intellectual person.

            Who would lose, Though full of pain, this
            intellectual being, Those thoughts that wander
            through eternity?                     --Milton.

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

   4. Relating to the understanding; treating of the mind; as,
      intellectual philosophy, sometimes called ``mental''
      philosophy.

Source : WordNet®

intellectual
     n : a person who uses the mind creatively [syn: {intellect}]

intellectual
     adj 1: of or relating to the intellect; "his intellectual career"
     2: of or associated with or requiring the use of the mind;
        "intellectual problems"; "the triumph of the rational over
        the animal side of man" [syn: {rational}, {noetic}]
     3: appealing to or using the intellect; "satire is an
        intellectual weapon"; "intellectual workers engaged in
        creative literary or artistic or scientific labor"; "has
        tremendous intellectual sympathy for oppressed people";
        "coldly intellectual"; "sort of the intellectual type";
        "intellectual literature" [ant: {nonintellectual}]
     4: involving intelligence rather than emotions or instinct; "a
        cerebral approach to the problem"; "cerebral drama" [syn:
        {cerebral}] [ant: {emotional}]