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.
vb (tr) 1. to aid an enemy of (one's nation, friend, etc); be a traitor to: to betray one's country. 2. to hand over or expose (one's nation, friend, etc) treacherously to an enemy. 3. to disclose (a secret, confidence, etc) treacherously. 4. to break (a promise) or be disloyal to (a person's trust)