taking place within the mind and modified by individual bias; "a subjective judgment" immanent: of a mental act performed entirely within the mind; "a cognition [..]

Not able to be accessed or observed. Opposite to objective. Something that is effected by personal feelings, prejudice and interpretations. You can read objective approach for more understanding. It i [..]

subjective (pop)

Beneath the threshold of the conscious. The inner side.

opinions and experiences particular to one person. sublimation

  That which exists in the mind or opinion of the viewer, rather than in the viewed  object itself. See also, objective.

(adj) taking place within the mind and modified by individual bias(adj) of a mental act performed entirely within the mind

"Subjective" means in relation to the subject (i.e the person acting, the "observer"), commonly used in the sense of "in the eye of the beholder", as opposed to "obj [..]

related more to the subject than to the object or representation out of which knowledge is constructed. Considered transcendentally, subjec­tive knowledge is more certain that objective knowledge; considered empiri­cally, subjective knowledge is less certain. (Cf. objective.)

Based on personal feeling, emotion or taste.