madam

Short definition from Wiktionary

Noun

1. 1
   A polite form of address for a woman or lady.
2. 2
   The mistress of a household.
3. 3
   A conceited or quarrelsome girl.
4. 4
   A woman who runs a brothel, particularly one that specializes in finding prostitutes for rich and important clients.
5. 5
   A hated or contemptuous woman; used as a general term of abuse
6. 6
   Alternative letter-case form of madam.
7. 7
   A polite form of address and title, abbreviated Mdm, used before a (usually middle-aged) adult or elderly woman's surname, full name or given name if she does not have a family name.

Verb

1. 1
   To address as "madam".
2. 2
   To be a madam; to run (a brothel).