a person appointed to superintend or preside.

an administrative officer in any of various colleges and universities who holds high rank and is concerned with the curriculum, faculty appointments, etc.

Ecclesiastical . the chief dignitary of a cathedral or collegiate church.

the steward or bailiff of a medieval manor or an officer of a medieval administrative district.

the mayor of a municipality in Scotland.

Obsolete . a prison warden.

noun

administrator , chief , director , executive , head , jailer , keeper , magistrate , officer , official , supervisor