D defs.my
Entry 3 senses Webster, 1913

Madam

/măd'-əm/ · Mad·am · IPA /ˈmæd.əm/
01 n. A gentlewoman; -- an appellation or courteous form of address given to a lady, especially an elderly or a married lady; -- much used in the…
pl. Madams, Mesdames ((#))
  1. 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. 2.
    The woman who is in charge of a household.
  3. 3.
    The woman who is in charge of a brothel.