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Look up treacherous or treachery in Wiktionary, the free dictionary.
Treachery is the betrayal or violation of trust. It may refer to:
- Treachery (law), an offence in several countries, related to treason
- Treachery (Revenge), the eighth episode of the American television series Revenge
- Treachery (film), a film written and directed by Travis Romero and starring Michael Biehn
- The Dark Tower: Treachery, the Stephen King comic book series
- An Old Norse word for Sköll, a wolf in Norse mythology