Mentioned in the ninth article of the Apostles' Creed. It has been interpreted in several senses:
1. The spiritual union existing between each Christian and Christ, and so between each and every Christian, either those in the Paradise (the "Church Triumphant"), or on earth (the "Church Militant.") It is a communion of those who live as true children of God, through the gift of the divine grace, with the Holy Trinity, practicing mutual love with the heavenly creatures and with each other. 2. The sharing of holy things, i.e. the share which all Christians have in the Sacraments, especially the Eucharist.
Dictionary of church terms. — St. GEORGE'S COPTIC ORTHODOX CHURCH SPORTING - ALEXANDRIA EGYPT. Fr. Tadros Yacoub Maiaty.