Definition of: ego

(ē′go, eg′ō) noun plural e·gos
1. Self, considered as the seat of consciousness.
2. In philosophy, the entire man, body and mind.
3. Psychol. The self, considered as the aggregate of all conscious acts and states, whether organized or sporadic, but having a unity and continuity differentiating it from all others.
4. Psychoanal. The superficial conscious part of the id, developed in response to the physical and social environment.
5. In metaphysics, the permanent real being to whom all the conscious states and attributes belong.
6. Colloq. Self–centeredness; egotism; conceit. [<L, I]