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.)
- An honorific form of address for an eminent person in France, especially under the Ancien Régime.
- Specifically, a title of the Dauphin of France.