[mad.am] n, pl madams [ME, fr. MF ma dame, lit., my lady] (14c) 1 pl mes.dames : lady--used without a name as a form of respectful or polite address to a woman
2: mistress 1--used as a title formerly with the given name but now with the surname or esp. with a designation of rank or office "Madam Chairman" "Madam President"
3: the female head of a house of prostitution
4: the female head of a household: wife