Wiktionary (0.00 / 0 votes) Rate this definition: executive (Noun). A title of a chief officer or administrator, especially one who can make significant decisions on her/his own authority. executive (Noun).That branch of government which is responsible for enforcing laws and judicial decisions, and for the day-to-day administration of the state.iktionary (0.00 / 0 votes) Rate this definition: executive (Noun). A title of a chief officer or administrator, especially one who can make significant decisions on her/his own authority. executive (Noun).