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.
Learner's definition of BETRAY. [+ object] 1. : to give information about (a person, group, country, etc.) to an enemy. They betrayed their country by selling its secrets to other governments. He was betrayed (to the authorities) by one of his students.