Wikipedia
In Oriental Orthodoxy the Holy Synod is the highest authority in the church and it formulates the rules and regulations regarding matters of church organisation, faith, and order of service.
Usage examples of "holy synod".
The Patriarchate of Moscow was abolished and the Holy Synod made its appearance as the highest source of authority in all matters of the Established Church.
As procurator of the Holy Synod he received a silent nod from the Greek Church for his scheme which called for the elimination of the Jewish population.
This move obviously alarmed the Paulicians too, because the Holy Synod of the Russian Orthodox Church declared: “.
Well, not the city itself exactly, rather the holy synod, but by that time Tavalisk was so powerful with the merchants and the masses that the clergy dared not pick another.