The Collaborative International Dictionary
Felo-de-se \Fe"lo-de-se`\, n.; pl. Felos-de-se. [LL. felo, E.
felon + de of, concerning + se self.] (Law)
One who deliberately puts an end to his own existence, or
loses his life while engaged in the commission of an unlawful
or malicious act; a suicide.
--Burrill.
Douglas Harper's Etymology Dictionary
in old law use, "one who commits the felony of suicide," whether deliberately or in maliciously attempting to kill another, Latin, literally "one guilty concerning himself." See felon.
Wiktionary
n. (context legal English) One who deliberately puts an end to his own existence, or loses his life while engaged in the commission of an unlawful or malicious act; a suicide.
WordNet
n. a person who kills himself intentionally [syn: suicide]
an act of deliberate self destruction