Messrs. vs. Mr.?

Hi, is Messrs. the plural of Mrs.? If so, what does Messrs. send for? I mean Mr. stands for Mister and it seems Messrs. is also an abbreviation. What is the full version of Messrs. then? Thanks for all your explanations in 2005 and I look forward to your answers in 2006 :wink:

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Messrs = Messieurs (abbr. plural of Monsieur). It is the formal way of addressing a letter to several Misters.
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