To mar something is to damage, spoil, deface, disfigure, or scar itâ€either literally (such as by scratching or making a mark on an object) or figuratively (such as by spoiling a party by getting into an … Find the latest marriott international, inc. (mar) stock quote, history, news and other vital information to help you with your stock trading and investing.

A number of problems marred the smooth running of this event. Definition of mar verb in oxford advanced learner's dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.