headcanon

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noun

Elements and interpretations of a fictional universe accepted by an individual or small group of fans, but not necessarily found within or supported by the official canon.

“I headcanon her as gay.”

Scrabble 15

Meanings

nounheadcanon (countable and uncountable, plural headcanons)

plural headcanons · alternative head canon

  1. countableslanguncountablelifestyleElements and interpretations of a fictional universe accepted by an individual or small group of fans, but not necessarily found within or supported by the official canon.

    In my own headcanon of Rocky IV, Ivan Drago is a Russian Mafia enforcer instead of a Red Army Captain.

    3 more examples

    Technically, the social context of Borogravia is such that the actual external difference between a trans man and a woman disguised as a man is practically indiscernible – the technology level means they’re indistinguishable by the bodily modification standard (although now that I think about it, there's no reason Igors couldn't perform sex changes, and that's going in my headcanon now), and there does not appear to be a space in the language for self-identification.

    2012, Maggie K, "Let's talk about socks: Gender performativity in Terry Pratchett's Monstrous Regiment", Queer Vertigo 2012 (University of Technology, Sydney), unknown date, page 17

    That wouldn't be so bad if it weren't for the fact that they just fill in the missing information with whatever headcanon (one's personal belief of what is true to the universe) they want instead of actually trying to find out more about the character.

    2012 June 11, Bea Huff, “Love the character, not the actor”, in Daily Nebraskan, volume 111, number 151, Lincoln: University of Nebraska, page 3

    Don't forget if they can write pages and pages and pages of “headcanon” information for an already developed character, probably changing his or her already set personality or even expanding upon it.

    2013, Kristal Frenero, "Fifty shades of fan crazy", The Talon Newsmagazine (John A. Ferguson Senior High), Volume 10, Issue 2, February 2013, page 8
verbheadcanon (third-person singular simple present headcanons, present participle headcanoning, simple past and past participle headcanoned)

present singular third person headcanons · participle present headcanoning · participle past headcanoned · past headcanoned · alternative head canon

  1. slanglifestyleTo interpret in the form of a headcanon.

    I headcanon her as gay.

    1 more example

    From headcanoning him, kicking his legs, and blushing at a compliment to wearing cat ears, Ghost’s menacing persona is being accepted as a cute little quirk to the girlies. In response, much of COD’s male fanbase is accusing this mostly-female demographic of babygirlifiers of sexualizing him.

    2022 November 30, Rachel Choi, “The babygirlification of Ghost in COD is threatening the incels”, in The Berkeley Beacon

Origin

From head + canon. First attested in c. 2007.

Full word history & related roots →

Translations

Chinese Mandarin 腦洞 /脑洞, 私設 /私设
  • 腦洞 /脑洞 (nǎodòng)fandom slang: fan interpretations of a fictional universe
  • 私設 /私设 (sīshè)fandom slang: fan interpretations of a fictional universe
  • 腦補 /脑补 (nǎobǔ)Translations
Russian хедкано́н, хедкано́нить
  • хедкано́н (xedkanón)fandom slang: fan interpretations of a fictional universe
  • хедкано́нить (xedkanónitʹ)Translations
Ukrainian гедкано́н, гедкано́нити
  • гедкано́н (hedkanón)fandom slang: fan interpretations of a fictional universe
  • гедкано́нити (hedkanónyty)Translations
Cite this entry
APA

headcanon. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/headcanon

MLA

“headcanon.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/headcanon. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “headcanon,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/headcanon.

Source: headcanon on Wiktionary, CC BY-SA 4.0.