EGO BOUNDARY By N., Pam M.S. - April 7, 2013 1. Concept that we can distuiguish between self and not self. 2. The boundary between ego and the id or the ego and the external reality. EGO BOUNDARY: "The ego boundary allows us to distinguish between self and not self." Related Psychology Terms EXTERNAL BOUNDARY INTERNAL BOUNDARY BOUNDARY SYSTEM BOUNDARY SYSTEM PSYCHIC REALITY EXTERNAL WORLD INTROJECTION DETERIORATION OF ATTENTION EXTERIORIZATION BOUNDARY Cite this page: N., Pam M.S., "EGO BOUNDARY," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/ego-boundary/ (accessed March 30, 2020).