prop2Pronunciation: /prɒp/Translate prop | into French | into German | into Italian | into Spanish Definition of prop noun (usually props) a portable object other than furniture or costumes used on the set of a play or film. (props) [treated as singular] informal, dated a property man or mistress. Origin: mid 19th century: abbreviation of propertyprop in other Oxford dictionaries Definition of prop in the US English dictionary