noun. 
                    A state or act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; treachery.
                  
                
                  
                    noun. 
                    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.
                  
                
                  
                    noun. 
                    A state or act of deceit.