Church of Rome, Roman Catholic Church, Roman Church, Western Church, Roman Catholic - the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy

Church Father, Father of the Church, Father - (Christianity) any of about 70 theologians in the period from the 2nd to the 7th century whose writing established and confirmed official church doctrine; in the Roman Catholic Church some were later declared saints and became Doctor of the Church; the best known Lation Church Fathers are Ambrose, Augustine, Gregory the Great, and Jerome; those who wrote in Greek include Athanasius, Basil, Gregory Nazianzen, and John Chrysostom

Doctor of the Church, Doctor - (Roman Catholic Church) a title conferred on 33 saints who distinguished themselves through the othodoxy of their theological teaching; "the Doctors of the Church greatly influenced Christian thought down to the late Middle Ages"

saint - a person who has died and has been declared a saint by canonization

theologian, theologiser, theologist, theologizer - someone who is learned in theology or who speculates about theology (especially Christian theology)