Orthodox Church: Meaning and Definition of

Or'thodox Church'

Pronunciation: [key]
  1. the Christian church comprising the local and national Eastern churches that are in communion with the ecumenical patriarch of Constantinople; Byzantine Church.
  2. (originally) the Christian church of those countries formerly comprising the Eastern Roman Empire and of countries evangelized from it; Greek Orthodox Church.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.