Adjective
Pertaining to, or produced by, the intellect or understanding; intellectual.
Having power to understand, know, or comprehend; intelligent; rational.
Capable of being perceived by the understanding only, not by the senses.
Source: Webster's dictionaryWhen a reasonable Soul forsaketh his divine nature, and becometh beast-like, it dieth. For though the substance of the Soul be incorruptible: yet, lacking the use of Reason, it is reputed dead; for it loseth the Intellective Life. Pythagoras
I cannot be content with less than heaven; Living, and comprehensive of all life. Thee, universal heaven, celestial all; Thee, sacred seat of intellective time; Field of the soul's best wisdom: home of truth, Star-throned. Philip James Bailey