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1.
Another word for official. Used quite often in fan fiction to differentiate between the official storyline in which the fan fiction is based on.
"This fan fiction story is actually pretty close to being canon written by the original author."
by IceWarm September 27, 2005
 
2.
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 03, 2003
 
3.
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 02, 2006
 
4.
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
~~~~~~~~
Oh my GOD that Naruto fan fiction SUCKED! Thank God it wasn't canon.
by gunslingergirlvy_c_e October 07, 2007
 
5.
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
 
6.
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
 
7.
To participate in or continue a heavy drinking session, particularly involving drinking of beer from cans.
Shall we go home or can on?
by Wendell2 July 13, 2008