- any of the churches originating in countries formerly part of the Eastern Roman Empire, observing an Eastern rite and adhering to the Niceno-Constantinopolitan Creed; Byzantine Church.
- Orthodox Church(def 2).
Origin of Eastern Church
First recorded in 1585–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any of the Christian Churches of the former Byzantine Empire
- any Church owing allegiance to the Orthodox Church and in communion with the Greek patriarchal see of Constantinople
- any Church, including Uniat Churches, having Eastern forms of liturgy and institutions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012