Definitions of intellectual:

• noun:   a person who uses the mind creatively
• adjective:   appealing to or using the intellect

  Example: "Satire is an intellectual weapon"

• adjective:   of or associated with or requiring the use of the mind

  Example: "Intellectual problems"

• adjective:   of or relating to the intellect

  Example: "His intellectual career"

• adjective:   involving intelligence rather than emotions or instinct