The meaning of PERFIDY is the quality or state of being faithless or disloyal : treachery. How to use perfidy in a sentence.

PERFIDY definition: deliberate breach of faith or trust; faithlessness; treachery. See examples of perfidy used in a sentence.

PERFIDY definition: 1. behaviour that is not loyal 2. behavior that is not loyal. Learn more.

perfidy 1. breach of trust, especially treachery or treason. 2. an act or instance of this. — perfidious, adj. See also: Treason

Definition of perfidy noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Perfidy constitutes a breach of the laws of war and is a war crime, as it degrades the protections and mutual restraints developed in the interest of all parties, combatants and civilians.

2025年12月14日 · Noun perfidy (countable and uncountable, plural perfidies) A state or act of violating faith or allegiance; violation of a promise or vow, or of trust. Synonyms: betrayal, …