from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Used as a courtesy title before the surname, full name, or professional title of a man in a French-speaking area: Monsieur Cartier; Monsieur Jacques Cartier.
- n. Used as a form of polite address for a man in a French-speaking area.
from the GNU version of the Collaborative International Dictionary of English
- n. The common title of civility in France in speaking to, or of, a man; Mr. or Sir.
- n. The oldest brother of the king of France.
- n. A Frenchman.
from The Century Dictionary and Cyclopedia
- n. Literally, my lord; sir: the common title of courtesy in France, answering to the English Mr. Abbreviated M., Mons.; plural MM., Messrs.
- n. A title given to the eldest brother of the King of France.
- n. A Frenchman: vulgarly and humorously mounseer.
- n. A gentleman: said of a Frenchman.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. used as a French courtesy title; equivalent to English `Mr'
French, from Old French : mon, my (from Latin meum, accusative of meus; see me-1 in Indo-European roots) + sieur, lord, sir (from Vulgar Latin *seiorem, accusative of *seior; see sire).(American Heritage® Dictionary of the English Language, Fourth Edition)