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1.
Music written about an established fictional realm such as a popular book or film. Essentially it is musical fan fiction. E.G. Wizard Rock, Twihardcore
Harry and the Potters brought Band Fiction into the mainstream.
by Joshtown January 02, 2009
 
2.
Stories written by fans, in which the main characters are those from bands. A form of fanfiction. Sometimes slash.
-I read this really good _____{insert band name here}______ bandfiction last night.
by samfish13 April 14, 2008
 
3.
Fiction written using one or more members of a band or bands.
Mary read a band fiction involving the band Avenged Sevenfold
by LilyHeart August 28, 2008