Individuation is a concept central to Carl Jung’s work, and refers to a process by which a person becomes a complete psychological individual, by synthesizing different aspects of the self, and uniting the unconscious with the conscious. In Jung’s own words: “Individuation means becoming a single, homogenous being, and, in so far as “individuality” embraces our innermost, last, and incomparable uniqueness, it also implies becoming ones own self. We could therefore translate individuation as “coming to selfhood” or “self-actualization””.
Jung, C. G. (1972) Two Essays on Analytical Psychology (Collected Works of C.G. Jung Vol.7) Paragraph 266. Adler, G.; Hull, R. F. C. (Trans.). Princeton University Press (Original work published in 1917, 1928).