'Madam' definitions:

Definition of 'madam'

From: WordNet
noun
A woman of refinement; "a chauffeur opened the door of the limousine for the grand lady" [syn: dame, madam, ma'am, lady, gentlewoman]
noun
A woman who runs a house of prostitution [syn: madam, brothel keeper]

Definition of 'Madam'

From: GCIDE
  • 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. [1913 Webster]
  • 2. The woman who is in charge of a household. [PJC]
  • 3. The woman who is in charge of a brothel. [PJC]