mar. 1  to damage or spoil to a certain extent; render less perfect, attractive, useful, etc.; impair or spoil: That billboard mars the view. 2  to disfigure, deface, or scar: The scratch marred the table.
Here are all the possible meanings and translations of the word betrayal. Princeton's WordNet(0.00 / 0 votes)Rate this definition: treachery, betrayal, treason, perfidy(noun) an act of deliberate betrayal. betrayal(noun) the quality of aiding an enemy.
Definition of deception. 1  1a : the act of causing someone to accept as true or valid what is false or invalid : the act of deceiving resorting to falsehood and deception used deception to leak the classified informationb : the fact or condition of being deceived the deception of his audience.