
1) Ecclesiastical style
Found on
https://www.crosswordclues.com/clue/monseigneur

Monseigneur is an honorific in the French language. It has occasional English use as well, as it may be a title before the name of a French prelate, a member of a royal family or other dignitary. Monsignor is both a title and an honorific in the Roman Catholic Church. In francophone countries, it is rendered Monseigneur, and this spelling is also ...
Found on
http://en.wikipedia.org/wiki/Monseigneur

• (n.) 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.)
Found on
http://thinkexist.com/dictionary/meaning/monseigneur/

former French title, appearing without an adjoining proper name, used to refer to or address the dauphin, or grand dauphin, heir apparent to the ...
Found on
http://www.britannica.com/eb/a-z/m/114

Mon`sei`gneur' noun ; plural Messeigneurs . [ French, from mon my + seigneur lord, Latin senior older. See Senior , and confer Monsieur .] My lord; -- a title in France of a person of high birth or rank; as, Monseigneur the Prince, or
Found on
http://www.encyclo.co.uk/webster/M/97

Monseigneur is a title of dignity in France. Under Louis XIV. the dauphin was styled monseigneur, without any addition. Princes, dukes and peers, archbishops, bishops (who adopted the title at the close of the 17th century), cardinals, marshals of France, presidents of parliament, etc, were addressed by this title.
Found on
http://www.probertencyclopaedia.com/browse/AM.HTM

a French title of honor given to princes, bishops, and other persons of eminence. · a person bearing this title.
Found on
https://www.infoplease.com/dictionary/monseigneur
No exact match found.