Monsieur
Pronunciation : Mon*sieur"
Part of Speech : n.;
Etymology : [F., fr. mon my + Sieur, abbrev. of seigneur lord. See Monseigneur.]
Definition : 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.
pl. Messieurs.
Source : Webster's Unabridged Dictionary, 1913