A member of the Greek Church, who nevertheless acknowledges the supremacy of the Pope of Rome; one of the United Greeks. Also used adjectively.

a member of the Uniat Church

of or relating to former Eastern Christian or Orthodox churches that have been received under the jurisdiction of the Church of Rome but retain their own rituals and practices and canon law

An Orthodox believer who has accepted Church Union with Rome and submitted to the pope; in most cases the popes allowed the Uniates to retain their own services. (Fine, John V.A. Jr. The Late Medieval Balkans, 627)

Church Sometimes referred to as the Greek Catholic Church. A branch of the Catholic Church preserving the Eastern rite and discipline but submitting to papal authority; found primarily in western Ukraine and Carpatho-Ukraine ( q.v.).