alter ego

al·ter ego

noun \ˌȯl-tər-ˈē-(ˌ)gō also -ˈe-(ˌ)gō\

Definition of ALTER EGO

: a second self: as

a : a trusted friend

b : the opposite side of a personality

c : counterpart 3

Examples of ALTER EGO

1. a trusted adviser who is the President's alter ego
2. <over the years the state's other senator became his alter ego as well as his political ally>

Origin of ALTER EGO

Latin, literally, second I

First Known Use: 1537

Related to ALTER EGO

Synonyms

friend, amigo, buddy, chum, compadre, comrade, confidant, confidante, crony, familiar, intimate, mate [chiefly British], musketeer, pal

Antonyms

enemy, foe

Related Words

acquaintance; associate, cohort, colleague, companion, fellow, hearty, hobnobber, partner, peer, sport; blood brother, brother, main man, sister; abettor (also abetter), accomplice, ally, collaborator, confederate; pen pal; benefactor, supporter, sympathizer, well-wisher; friendly

Near Antonyms

adversary, antagonist, competitor, opponent, rival; archenemy, nemesis