Deputy One appointed as the substitute of another, and empowered to act for him, in his name or his behalf; a substitute in office; a lieutenant; a representative; a delegate; a vicegerent; as, the deputy of a prince, of a sheriff, of a township, etc.
Deputy A member of the Chamber of Deputies.
deputy an assistant with power to act when his superior is absent
deputy sheriff someone authorized to exercise the powers of sheriff in emergencies