DELUSION OF GRANDEUR By N., Sam M.S. - 6 Falsely attributing one's self with great ability, importance, worth, identity or power. See megalomania. DELUSION OF GRANDEUR: "Joe had a delusion of grandeur about how important he was." Related Psychology Terms Dissociative Identity Disorder Hitler and Conformity ADOLESCENCE (Theories) Counselor's Role in Emergency Teams Diagnosis and Treatment Planning GRANDIOSE DELUSIONS HORNEY, KAREN (1885-1952) Ethics and Legal Course: Landmark Legal Case COGNITIVE DISSONANCE (Dissonance Theory) Discrimination and Mental Illness in the LGBT Population Cite this page: N., Sam M.S., "DELUSION OF GRANDEUR," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/delusion-of-grandeur/ (accessed June 27, 2022).