Mon ‧ sieur /məˈsjɜː $ -ˈsjɜːr/ BrE AmE noun ( plural Messieurs /meɪˈsjɜːz $ -ˈsjɜːrz/)
used when speaking to or about a French-speaking man ⇨ Madame , Mademoiselle :
Monsieur Lacombe
Mon ‧ sieur /məˈsjɜː $ -ˈsjɜːr/ BrE AmE noun ( plural Messieurs /meɪˈsjɜːz $ -ˈsjɜːrz/)
used when speaking to or about a French-speaking man ⇨ Madame , Mademoiselle :
Monsieur Lacombe
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012