Definition: When discussing human development, individuation refers to the process of forming a stable personality. As a person individuates, he gains a clearer sense of self that is separate from parents and others around him.
Carl Jung used the term "individuation" extensively in his work on personality development.
Rathus, PhD, Spencer. Psychology: Concepts and Connections, Brief Version. 8th edition. 2007. Belmont, CA: Thomson, Wadsworth.