magister

Meanings

1. Master; sir: a title used in the Middle Ages, given to a person in authority, or to one having a licence from a university to teach philosophy and the liberal arts.
2. The possessor of a master's degree.
3. The chief male celebrant of an occult ritual.

Etymology

Borrowed from Latin magister (“a master, chief, head, superior, director, teacher, etc.”), from magis (“more or great”) + -ter. Doublet of maestro, master, and meister.