historically is a council of a church, usually convened to decide an issue of doctrine, administration or application. In modern usage, the word often refers to the governing body of a particular church, whether its members are meeting or not. It is also sometimes used to refer to a church that is governed by a synod.
The word synod comes from the Greek σύνοδος (sýnodos) meaning "assembly" or "meeting", and it is synonymous with the Latin word concilium meaning "council". Originally, synods were meetings of bishops, and the word is still used in that sense in Catholicism and Eastern Orthodoxy.
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RUSSIAN CHURCH Defn: The established church of the Russian empire. It forms a portion, by far the largest, of the Eastern Church and is governed by the Holy Synod. The czar is the head of the church, but he has never claimed the right of deciding questions of theology and dogma.
They prayed, as they always do, for peace from on high and for salvation, for the Holy Synod, and for the Tsar; they prayed, too, for the servants of God, Konstantin and Ekaterina, now plighting their troth.
Leo Tolstoy. Anna Karenina
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all you Gods, / In generall Synod take away her power: / Breake all the Spokes and Fallies from her wheele