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.

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, …

Perfidy is a noun that denotes deceitfulness or betrayal. It specifically implies an act of deliberate treachery or a violation of trust. The term carries a grave connotation and is often used to …