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.
The dictionary defines treason as a violation of allegiance toward ones country or sovereign, especially the betrayal of ones country by waging war against it or by consciously and purposely acting to aid its enemies. (American Heritage Dictionary of the English Language)