ego [ˈiːgəʊ ˈɛgəʊ]
n pl egos
1. the self of an individual person; the conscious subject
2. (Psychoanalysis) Psychoanal the conscious mind, based on perception of the environment from birth onwards: responsible for modifying the antisocial instincts of the id and itself modified by the conscience (superego)
3. one's image of oneself; morale to boost one's ego
4. egotism; conceit