Madam \Mad"am\, n.; pl. {Madams}, or {Mesdames}. [See {Madame}.] 1. A gentlewoman; -- an appellation or courteous form of address given to a lady, especially an elderly or a married lady; -- much used in the address, at the beginning of a letter, to a woman. The corresponding word in addressing a man is {Sir}; often abbreviated ma'am when used as a term of address.
2. The woman who is in charge of a household. [PJC]
3. The woman who is in charge of a brothel. [PJC]
Madame \Ma`dame"\, n.; pl. {Mesdames}. [F., fr. ma my (L. mea) + dame dame. See {Dame}, and cf. {Madonna}.] My lady; -- a French title formerly given to ladies of quality; now, in France, given to all married women. --Chaucer.
Mesdames \Mes`dames"\ (F. ?, E. ?), n., pl. of {Madame} and {Madam}.