In slang, a word used by those who write fanfiction. It refers to the original body of work that the fanfiction came from.
Her fanfiction ideas screwed around with the canon storyline of Buffy: The Vampire Slayer.
by Kathy October 4, 2003
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A piece of work -usually in reference to literature- that was written by the original author. Spin-offs, fan fiction, and any work not written by the original author of that fictional universe is considered non-canon.
I got sad at the end of Rurouni Kenshin: Seisouhen. Good thing it took out a lot of chunks from the original plot and wasn't written by Nobuhiro Watsuki, or else it would have been considered canon. :D
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Oh my GOD that Naruto fan fiction SUCKED! Thank God it wasn't canon.
by gunslingergirlvy_c_e October 7, 2007
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1. A process where worthy people are endowed among the canon of saints.

2. The murdering of Jedi Knights by force of millions of Stormtroopers.
1. All saints are accepted into the canon of saints through a process known as canonization.

2. All the Jedi were hunted down and destroyed by millions of Stormtroopers through a process known as canonization.
by de Frosting le Lobster September 25, 2010
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A term used especially within gaming communties to differentiate between the official storyline (= canon) and everything which is not, like fanfiction, fanvids, etc.
"A lot of people consider Chell to be the daughter of Cave & Caroline, but it's by no means canon."
by meimeiriver September 17, 2011
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default pairings, often used to describe pairings in fanfiction that are claimed to be obvious. in other words, a couple that is heavily promoted or suggested in the show.
Jaden/Syrus is almost as canon to shonen fans as Jaden/Alexis is to het fans.
by the new bat girl January 3, 2006
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A fanfiction or pairing that is true to the original work.
Puzzleshipping is so canon, don't you think?
by Aderyn W. June 13, 2011
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Canon is a term for official, as in one loves another in most universes.
Gayden: ELEDEAN IS CANON!

Eleanor: NO IT IS FUCKING NOT

Gaylor: YES IT IS #ELEDEAN

Eleanor: SHUT UP JEAFUS

Eleanor: Dean is pretty hot though

Dean: What
by eledean shipper 2k14 October 18, 2014
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