What is communion?
The term means “union with.” It is used in phrases such as “the Anglican Communion” and “the communion of saints.” It is also used to mean Holy Communion, union with one another in Christ in the Sacrament of His Body and Blood. In this sense it is used 1) as a title for the entire service of the Holy Eucharist, 2) as a title for the Great Thanksgiving, beginning with the offertory, and 3) to mean the ministration or reception of the consecrated Bread and Wine. The term is used to translate the Greek koinonia.