magister

Master; sir: an appellation given in the middle ages to persons of scientific or literary distinction, equivalent to the modern title of doctor.

Master; sir; — a title of the Middle Ages, given to a person in authority, or to one having a license from a university to teach philosophy and the liberal arts.

Master; sir: — a title of the Middle Ages, given to a person in authority, or to one having a license from a university to teach philosophy and the liberal arts.

The possessor of a master’s degree.