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

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

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

Factsheet What does the noun perfidy mean? There are two meanings listed in OED's entry for the noun perfidy. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

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

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

PERFIDY meaning: the act of betraying someone or something the state of not being loyal

1. Deliberate breach of faith; calculated violation of trust; treachery: "the fink, whose perfidy was equaled only by his gall" (Gilbert Millstein). 2. The act or an instance of treachery.

Dec 14, 2025 · 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, …

an act or the practice of conscious, deliberate disloyalty or treachery; breach of faith. The traitor was captured by his former regiment and made to suffer for his perfidy. The meaning of …