Accidental may refer to:
Accidental (music), a symbol which changes the pitch of a note Accidental (album), by Fred Frith Accidental (biology), a biological phenomenon more commonly known as vagrancy The Accidental, a 2005 novel by Ali Smith The Accidental (band), a UK folk band Accidental property, a philosophical term
See also Accidence (or inflection), a modification of a word to express different grammatical categories Accident (disambiguation) Adventitious, which is closely related to "accidental" as used in philosophy and in biology Random, which often is used incorrectly where accidental or adventitious would be appropriate