The definition of perfidious is someone or something that cannot be trusted or that is dishonest.adjective
A person who lies all the time is an example of someone who would be described as perfidious.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Origin: L perfidiosus
- perfidiously adverb
Used by arrangement with John Wiley & Sons, Inc.
- per·fidˈi·ous·ly adverb