Chancellor

the chief minister of state in certain parliamentary governments, as in Germany; prime minister; premier.
the chief administrative officer in certain American universities.
a secretary, as to a king or noble or of an embassy.
the priest in charge of a Roman Catholic chancery.
the title of various important judges and other high officials.
(in some states of the U.S.) the judge of a court of equity or chancery.
British. the honorary, nonresident, titular head of a university.
noun
the head of the government in several European countries
(US) the president of a university or, in some colleges, the chief administrative officer
(Brit & Canadian) the honorary head of a university Compare vice chancellor (sense 1)
(US) (in some states) the presiding judge of a court of chancery or equity
(Brit) the chief secretary of an embassy
(Christianity) a clergyman acting as the law officer of a bishop
(archaic) the chief secretary of a prince, nobleman, etc
n.

early 12c., from Old French chancelier (12c.), from Late Latin cancellarius “keeper of the barrier, secretary, usher of a law court,” so called because he worked behind a lattice (Latin cancellus) at a basilica or law court (see chancel). In the Roman Empire, a sort of court usher; the post gradually gained importance in the Western kingdoms. A variant form, canceler, existed in Old English, from Old North French, but was replaced by this central French form.

one who has judicial authority, literally, a “lord of judgement;” a title given to the Persian governor of Samaria (Ezra 4:8, 9, 17).