(WOMAN) [noun] [U] - a formal and polite way of speaking to a womanMay I carry your cases for you, Madam? [as form of address]See study section: Titles and forms of addressDear Madam is the usual way of beginning a formal letter to a woman whose name you do not know.(informal dated disapproving) If you call a young girl a madam, you mean that she behaves like an older person and expects others to obey her.She's turning into a proper little madam.
MADAM
Meaning of MADAM in English
Cambridge English vocab. Кембриджский английский словарь. 2012