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
meaning "assembly" or "meeting", and it is synonymous with the Latin word concilium