(1):

(n.) One who practices moral duties; a person who lives in conformity with moral rules; one of correct deportment and dealings with his fellow-creatures; - sometimes used in contradistinction to one whose life is controlled by religious motives.

(2):

(n.) One who moralizes; one who teaches or animadverts upon the duties of life; a writer of essays intended to correct vice and inculcate moral duties.