A proper noun "rector" represents various placenames, including a city in arkansas, a ghost town in missouri, and an unincorporated community in pennsylvania.
In the Anglican Church, a cleric in charge of a parish and who owns the tithes of it.
In the Roman Catholic Church, a cleric with managerial as well as spiritual responsibility for a church or other institution.
(Eastern Orthodoxy, uncommon) A priest or bishop who is in charge of a parish or in an administrative leadership position in a theological seminary or academy.
In a Protestant church, a pastor in charge of a church with administrative and pastoral leadership combined.
A headmaster in various educational institutions, e.g. a university.
(Scotland) An official in Scottish universities who heads the university court and is elected by and represents the student body.