from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Two persons or organizations deemed indistinguishable in some way.
- n. A pair of people who spend a lot of time together, and look and act similarly.
from the GNU version of the Collaborative International Dictionary of English
- Two things practically alike; -- a phrase coined by John Byrom (1692-1793) in his satire “On the Feuds between Handel and Bononcini.”
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any two people who are hard to tell apart
From Tweedledum and Tweedledee, a pair of identical characters in Lewis Carroll's Through the Looking-Glass, and What Alice Found There (Wiktionary)