Black Widow:

• black widow spider (Latrodectus mactans), a poisonous spider that is infamous for the female's habit of eating the male after sexual intercourse. As a result, a woman who is believed to have killed her lover or husband is sometimes called a "black widow".
• A girl dressed all in black, accompanied by a man in a Zoot Suit
• The Black Widows are a Chechen rebel group.
• The Northrop P-61 Black Widow was an American night fighter aircraft used in World War II.
• Black Widow (film) is a 1987 film starring Debra Winger about a woman who kills the men she marries for their money.
• Black Widow (comics) is a fictional character from Marvel Comics, a spy who defected to the United States and joined The Avengers.
• Black Widow (arcade game) is an arcade game released in 1982.
• Jeanette Lee, a pool player who tends to dress in black, nicknamed "Black Widow".