from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Informal One who has a dual personality that alternates between phases of good and evil behavior.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Someone who alternates between a good and an evil personality.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. someone with two personalities - one good and one evil
After The Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson.(American Heritage® Dictionary of the English Language, Fourth Edition)
From The Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson (Wiktionary)