madam
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.

madam
The corresponding word in addressing a man is Sir. a woman who runs a house of prostitution.

madam
a woman of refinement; 'a chauffeur opened the door of the limousine for the grand lady'. a woman who runs a house of prostitution.