Messieurs \Mes"sieurs\ (?; F. ?; 277), n. pl. [F.; pl. of monsieur.] Sirs; gentlemen; -- abbreviated to Messrs., which is used as the plural of Mr.
Monsieur \Mon*sieur"\, n.; pl. {Messieurs}. [F., fr. mon my + Sieur, abbrev. of seigneur lord. See {Monseigneur}.] 1. The common title of civility in France in speaking to, or of, a man; Mr. or Sir. [Represented by the abbreviation M. or Mons. in the singular, and by {MM.} or {Messrs.} in the plural.]