- A state or act of violating faith or allegiance; violation of a promise or vow, or of trust
- (law) Specifically, in warfare, an illegitimate act of deception, such as using symbols like the Red Cross or white flag to gain proximity to an enemy for purposes of attack.
1921, Lassa Oppenheim; Ronald Francis Roxburgh, International law: a treatise, page 229:
- Stratagems must be carefully distinguished strategy from perfidy, since the former are allowed, whereas the latter is prohibited.
1993, Leslie C. Green, The contemporary law of armed conflict, page 89:
- Abuse of a protective emblem amounts to perfidy and constitutes a war crime under the customary law of armed conflict.
2008, Sidney Axinn, A Moral Military, page 84:
- Ruses of war are legitimate so long as they do not involve treachery or perfidy on the part of the belligerent resorting to them.
- A state or act of deceit.
2000 July 17, “Honda becomes chain letter victim”, in eWeek:
- Honda Motor Co. is the latest victim of e-mail perfidy, which started when a phony chain letter promised that the automaker would give away free cars.
2008 October 16, “McCain expected to make amends on Letterman show”, in Los Angeles Times:
- Letterman roared about the perfidy of lying politicos.
- For more examples of usage of this term, see Citations:perfidy.
the act of violating faith or allegiance.