Definition of Fallen angel

Fallen angel can also refer to:
In economics:

• A junk bond that was once investment-grade, but the expectation of being repaid has fallen considerably.

In literature:

• Fallen Angels (science fiction novel), a 1991 novel by science fiction authors Larry Niven, Jerry Pournelle, and Michael Flynn.
• Fallen Angels (Myers novel), a 1988 novel about the Vietnam War by Walter Dean Myers.
• Fallen Angels (Tracy Chevalier), a book by Tracy Chevalier.
• Fallen Angel (comics), a comic book by Peter David and currently published by IDW.
• Fallen Angels (comics), a 1987 Marvel Comics limited series.