Magister

·noun 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.

magister
măgister, tri (old orthog., ‡ magester, like ‡ leber, ‡ Menerva, for liber, Minerva, acc. to Quint. ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
magister
magister trī, m 1 MAC-, a master, chief, head, superior, director, president, leader, commander, c...

An Elementary Latin Dictionary