Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. Another side of oneself; a second self.
- n. An intimate friend or a constant companion.
Century Dictionary and Cyclopedia
- Second self; another self; counterpart; double. Sometimes applied as a title to a person who has full powers to act for another, as in the case of a Spanish viceroy when exercising regal power.
Wiktionary
- n. Somebody's alternate personality or persona; another self.
- n. A very close and intimate friend.
WordNet 3.0
- n. a very close and trusted friend who seems almost a part of yourself
Etymologies
- From Latin "other self", which is a translation of Zeno's Citium "allos ego" (Wiktionary)
- Latin : alter, other + ego, I, self. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“His alter ego was Delaroche, to whom he gave his daughter in marriage.”
“Evan Huter and his alter ego Ed McBain combined their talents to create Candyland, a novel in two parts, available from Pocket Books.”
“I sense that perhaps Wooden Boulder has become an alter ego for Nash: its unfolding story part of his life, the restless thing itself an embodiment of his soul.”
“My alter ego Demoness Mentia is doing that, and keeping an eye on my seven-year-old son, Ted.”
“Even back when I was nominally happy, my friend Bryce actually went so far as to create a superhero alter ego for me: The Amazing Sublimated Man.”
Lists
These user-created lists contain the word ‘alter ego’.
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probablyankita's list
Words are all I have to take your heart away
apartheid, techno-klutz, logorrheic, gordian knot, anodyne, odor of sanctity, finders keepers, foot-in-mouth dis..., dutch uncle, masquerade, smoke signals, furtive glance and 320 more...
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Dramatic Nouns
Nouns to be used as descriptions while writing stories
night owl, early bird, hedonist, ascetic, derelict, explorer, radical, pity friend, cupid, truant, caretaker, guardian and 120 more...
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Vocab++
Words as I learn them.
fetid, mezzanine, hiatus, austerity, subliminal, resplendent, implacable, impugn, debase, exiguous, cirque, holster and 2538 more...
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Amusing words
interesting words
bonce, furcate, tapioca, tillage, desalinate, garish, litmus, roadhog, azoic, haberdasher, imbroglio, polliwog and 802 more...
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Through Thick & Thin
sidekick, partner, buddy, ally, accessory, accomplice, cohort, collaborator, pal, mate, compadre, compatriot and 30 more...
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Friend or Foe
Also check out Reese Tee's Through Thick & Thin for more friend words.
comrade, netop, bro, bra, brah, girl, boy, dude, homie, dawg, best friend, BFF and 60 more...
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Fabulous Foreign Phrases
:-)
je ne sais quoi, joie de vivre, mot juste, esprit de corps, cherchez la femme, modus vivendi, avant garde, alter ego, panem et circenses, l'esprit de l'esc..., carpe diem, mea culpa and 9 more...
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triton1985's list
teoria de las ven..., ortodoxo - hetero..., ufano, tordo cantor, tolerancia, inquisidora, golem, "stronger than fi..., memoria iconica, memoria ecoica, jirones, lenguaje corporal and 77 more...
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skipvia's Words
syzygy, egg, lossy, catharsis, impuissance, truckle, obsequious, sequoia, sonot khazoot, alizarin, sepulchre, klister and 434 more...
Tweets
Looking for tweets for alter ego.

reesetee HA! A saggy SoG! Jan 7, 2008
sonofgroucho I abhor disguises....
Jan 5, 2008
skipvia Plus, glasses?! That's a disguise? Wouldn't somebody notice? Oct 23, 2007
uselessness But why Clark Kent? I mean, I'd at least be Donald Trump or somebody. Now Batman, there's a super with panache! Oct 23, 2007
chained_bear Yeah, but maybe he just fantasizes about being a regular guy. I mean, it's weird, but then again, he's from another planet and weird in many ways. Oct 23, 2007
skipvia You could alter your super metabolism so that you'd never even get tired! Oct 23, 2007
chained_bear It's probably too much work being Superman ALL the time. Wouldn't you think so? Oct 23, 2007
skipvia That part of a superhero that his/her arch enemy or arch nemesis can never discover, lest...lest... Come to think of it, why not drop the Clark Kent thing and just be Superman? If you could be Superman all the time or swap time between a guy that can see through walls and a wimpy reporter, which would you choose? Oct 23, 2007