Dictionary
al•ter e•go
Pronunciation: (ôl'tur ē'gō, eg"ō, al'-), [key]1. a second self; a perfect substitute or deputy:
His adviser acts as his alter ego during his absence.
2. an inseparable friend.
3. another aspect of one's self.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.