from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A woman of great seductive charm who leads men into compromising or dangerous situations.
- n. An alluring, mysterious woman.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An attractive and seductive but ultimately dangerous woman.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a woman who is considered to be dangerously seductive
French : femme, woman + fatale, deadly.(American Heritage® Dictionary of the English Language, Fourth Edition)
Borrowing from French femme fatale (literally "deadly woman"). (Wiktionary)