Of or pertaining to the church; relating to the organization or government of the church; not secular; as, ecclesiastical affairs or history; ecclesiastical courts.

This is an adjective describing anything that has to do with the Church. It comes from the Greek word ' ekklesia', which in the New Testament is translated as church. Its literal meaning is 'the called-out ones.'

Of or pertaining to a church, especially an organized institution.

A term from the Greek, EKKLESIA, pertaining to the church or used in association with clergymen.