Monsieur

from WordNet (r) 3.0 (2006)

Monsieur
    n 1: used as a French courtesy title; equivalent to English `Mr'

from The Collaborative International Dictionary of English v.0.48

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.]
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   2. The oldest brother of the king of France.
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   3. A Frenchman. [Contemptuous] --Shak.
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