n.
A piece of fiction within a
fandom utilizing characters and situations from a pre-existing work including (but not limited to) books, television programs, films, and comic strips.
Typically separated into
het,
slash, and general genres. Often used to play out
AU scenarios and/or various romantic pairings not found in the original work.
Distributed via mailing lists,
blogs, and
zines. Heavily archived online.
Kate writes fanfiction about what would've happened to Jack and Rose had the Titanic not sunk. Poor Kate.