Heresy is any belief or theory that is strongly at variance with established beliefs or customs.

Look up heresy in Wiktionary, the free dictionary.

Heresy may also refer to:

• Heresy (band), an English hardcore punk band

• Heresy (radio series), a British comedy talk show
• Heresy: Kingdom Come, a collectible card game
• The Heresies Collective, an American feminist collective
  • Heresies: A Feminist Publication on Art and Politics, a second wave feminist magazine (1977–1993) by the Heresies Collective
• Heresy, a 2001 novel in the Aquasilva Trilogy by Anselm Audley

• Hearsay (disambiguation)
• Heretic (disambiguation)

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