MONSEIGNEUR, "My LORD;" a title of honour used by the French in writing or speaking to dukes, peers, archbishops, bishops, and presidents a mortier. Monseigneur, absolutely used, is a title now restrained to the dauphin of France; thus it is said an officer belonging to Monseigneur: but this custom was not introduced till the reign of Lewis XIV. the dauphin before that time being called Monseigneur le Dauphin.