The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Fiction written by fans as an extension of an admired work or series of works, especially a television show, often posted on the Internet or published in fanzines.
Origin: fan2 + fic(tion).