n. pl. Mes·sieurs (mā-syœ, mĕsərz) 1. Abbr. M 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. 2. monsieur Used as a form of polite address for a man in a French-speaking area. [French, from Old French : mon, my (from Latin meum, accusative of meus; see me-1 in the Appendix of Indo-European roots) + sieur, lord, sir (from Vulgar Latin *seiorem, accusative of *seior; see SIRE).] |
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