noun

• A male given name from Irish or Old English.
• A surname from Irish [in turn originating as a patronymic], a rare anglicization of Mac Oscair (“son of Oscar”) (McCusker).
• A locale in the United States.
• An unincorporated community in Kentucky; named for Kentucky Representative Oscar Turner.
• An unincorporated community in Louisiana.
• An unincorporated community in Missouri; named for early settler Oscar Bradford.
• An unincorporated community in Oklahoma; named for local rancher Oscar W. Seay.
• An unincorporated community in Pennsylvania.
• An unincorporated community in West Virginia.
• (informal) An Academy Award.
• A statuette awarded by the Academy of Motion Picture Arts and Sciences.
• (rhyming slang, Australia, New Zealand) cash; money.
• A cichlid fish of species Astronotus ocellatus, native to South America, sometimes kept in aquariums.
• (international standards) Alternative letter-case form of Oscar from the NATO/ICAO Phonetic Alphabet.
• Initialism of Orbiting Satellite Carrying Amateur Radio.