noun treach·ery \-rē\

: harmful things that are done usually secretly to a friend, your own country, etc.

: an act of harming someone who trusts you

plural treach·er·ies

Full Definition of TREACHERY

:  violation of allegiance or of faith and confidence :  treason
:  an act of perfidy or treason

Examples of TREACHERY

  1. a tale of treachery and revenge
  2. <was furious that she revealed his secret and never forgave her for the treachery>


Middle English trecherie, from Anglo-French, from trecher, tricher to deceive, from Vulgar Latin *triccare — more at trick
First Known Use: 13th century

Rhymes with TREACHERY


Next Word in the Dictionary: treaclePrevious Word in the Dictionary: treacherousAll Words Near: treachery
March 30, 2015
amphibology Hear it
A phrase with more than one interpretation
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears