Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Willful betrayal of fidelity, confidence, or trust; perfidy.
  • n. The act or an instance of such betrayal.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Deliberate, often calculated, disregard for trust or faith.
  • n. The act of violating the confidence of another, usually for personal gain.
  • n. Treason.

from the GNU version of the Collaborative International Dictionary of English

  • n. Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy; treason.

from The Century Dictionary and Cyclopedia

  • n. Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy.
  • n. Synonyms See perfidious.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. betrayal of a trust
  • n. an act of deliberate betrayal

Etymologies

Middle English trecherie, from Old French, from trichier, to trick, probably from Vulgar Latin *triccāre; see trick.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English trecherie, from Old French tricherie, trecherie, from tricher, trichier ("to cheat"), from Middle Dutch trek ("a trick"), from trekken ("to draw, play a trick on"). More at trick. (Wiktionary)

Examples

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