Merriam-Webster's Collegiate® Dictionary, 11th Edition
INTELLECTUAL
I. adjective
Date: 14th century
1. of or relating to the intellect or its use, developed or chiefly guided by the intellect rather than by emotion or experience ; rational , requiring use of the intellect ,
2. given to study, reflection, and speculation, engaged in activity requiring the creative use of the intellect , intellectuality noun intellectually adverb intellectualness noun
II. noun
Date: 1615
intellectual powers, an intellectual person