Longman Dictionary of Contemporary English - madam

~ n 1 a polite way of addressing a woman, especially a customer in a shop  (Are you being served, Madam?) 2 Dear Madam used at the beginning of a business letter to a woman 3 Madam President/Ambassador etc a way of addressing a woman who has an important official position 4 a woman who is in charge of a brothel (=place where women are paid to have sex with men) 5 a (proper) little madam BrE informal a young girl who expects other people to do what she wants