Pronunciation spelling of my.
"The singer wrote her name in phonetic script as mah to show how it sounds when she speaks quickly."
A statement-final particle indicating obviousness.
"The sky is definitely blue, mah."
A surname.
"Mah is a common Chinese surname shared by many families in the region."
The English interjection mah comes from the Cantonese word maa³. It was borrowed to represent a sound of surprise or emphasis used in that dialect.