Monseigneur \Mon`sei`gneur"\, n.; pl. {Messeigneurs}. [F., fr. mon my + seigneur lord, L. senior older. See {Senior}, and cf. {Monsieur}.] My lord; -- a title in France of a person of high birth or rank; as, Monseigneur the Prince, or Monseigneur the Archibishop. It was given, specifically, to the dauphin, before the Revolution of 1789. (Abbrev. Mgr.)
messeigneurs See {monseigneur}