Communion's a polyvalent term. Though not Christian-specific, the term "communion" has several denotations within the Christian traditions. It may refer to: Communion (Christian), the relationship between Christians as individuals or Churches Full communion's a term used when two (or more) distinct Christian Churches say they're sharing the same communion. The Communion of Saints, a doctrine of Christianity mentioned in the Apostles' Creed A group of related Christian churches or denominatio… (More on Communion)