madam /ˈmadəm, ˈmædəm 
/ ▸ noun used to address or refer to a woman in a polite or respectful way: Can I help you, madam?
▪ (Madam) used to address a woman at the start of a formal or business letter: Dear Madam, ….
▪ (Madam) used before a title to address or refer to a female holder of that position: Madam President.
▪ a woman who runs a brothel.
– ORIGIN Middle English : from Old French ma dame ‘my lady’.
EnglishOxford New American Dictionary
