ma'amPronunciation: /mɑːm, mam, məm/Translate ma'am | into Italian Definition of ma'am noun a term of respectful or polite address used for: British female royalty. British a female officer in the police or armed forces who is senior to the speaker. North American or archaic a woman. Origin: mid 17th century: contraction of madamma'am in other Oxford dictionaries Definition of ma'am in the US English dictionary