subjective /-jek″tiv/ [L, subjectus, subject] , 1. pertaining to the essential nature of an object as perceived in the mind rather than to a thing in itself. 2. existing only in the mind. 3. that which arises within or is perceived by the individual, as contrasted with something that is modified by external circumstances or something that may be evaluated by objective standards. 4. pertaining to a person who places excessive importance on his own moods, attitudes, or opinions; egocentric.