noun the act of sharing; community; participation.
2. communion ·noun a body of christians having one common faith and discipline; as, the presbyterian communion.
3. communion ·noun the sacrament of the eucharist; the celebration of the lord's supper; the act of partaking of the sacrament; as, to go to communion; to partake of the communion.
4. communion ·noun intercourse between two or more persons; ·esp., intimate association and intercourse implying sympathy and confidence; interchange of thoughts, purposes, ·etc.; agreement; fellowship; as, the communion of saints.