prosecutor Syllabification: (pros·e·cu·tor)Pronunciation: /ˈpräsiˌkyo͞otər/Translate prosecutor | into French | into German | into Italian | into Spanish Definition of prosecutor noun a person, especially a public official, who institutes legal proceedings against someone. a lawyer who conducts the case against a defendant in a criminal court. Also called prosecuting attorney. Derivatives prosecutorialPronunciation: /ˌpräsikyəˈtôrēəl/ adjective prosecutor in other Oxford dictionaries Definition of prosecutor in the British & World English dictionary