What does “Ms.” stand for?

Ms. is a title used for any adult woman (e.g., “Ms. Genji”). Unlike “Miss” or “Mrs.,” “Ms.” does not indicate a woman’s marital status and is therefore the female equivalent of the masculine title “Mr.”

“Ms.” is not an abbreviation for anything, and it does not stand for “Miss.” It is pronounced [miz], but it is always written as “Ms.”