monsieur

Mon*sieur", n.; pl. Messieurs. Etym: [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.] 2. The oldest brother of the king of France. 3. A Frenchman. [Contemptuous] Shak.

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