com·mun·ion 
(kə-mynyən)
(kə-mynyən)n.
1. The act or an instance of sharing, as of thoughts or feelings.
2. Religious or spiritual fellowship.
3. A body of Christians with a common religious faith who practice the same rites; a denomination.
4. Communion Ecclesiastical
a. The sacrament of the Eucharist received by a congregation.
b. The consecrated elements of the Eucharist.
c. The part of the Mass or a liturgy in which the Eucharist is received.
[Middle English communioun, Christian fellowship, Eucharist, from Old French communion, from Late Latin commūniō, commūniōn-, from Latin, mutual participation, from commūnis, common; see COMMON.]