Source : Webster's Revised Unabridged Dictionary (1913)

Communion \Com*mun"ion\, n. [L. communio: cf. F. communion. See
   {Common}.]
   1. The act of sharing; community; participation. ``This
      communion of goods.'' --Blackstone.

   2. 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.

            We are naturally induced to seek communion and
            fellowship with others.               --Hooker.

            What communion hath light with darkness? --2 Cor.
                                                  vi. 14.

            Bare communion with a good church can never alone
            make a good man.                      --South.

   3. A body of Christians having one common faith and
      discipline; as, the Presbyterian communion.

   4. 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.

   {Close communion}. See under {Close}, a.

   {Communion elements}, the bread and wine used in the
      celebration of the Lord's supper.

   {Communion service}, the celebration of the Lord's supper, or
      the office or service therefor.

   {Communion table}, the table upon which the elements are
      placed at the celebration of the Lord's supper.

   {Communion in both kinds}, participation in both the bread
      and wine by all communicants.

   {Communion in one kind}, participation in but one element, as
      in the Roman Catholic Church, where the laity partake of
      the bread only.

   Syn: Share; participation; fellowship; converse; intercourse;
        unity; concord; agreement.

Source : WordNet®

Communion
     n 1: the act of participating in the celebration of the
          Eucharist; "the governor took Communion with the rest of
          the congregation" [syn: {Holy Communion}, {sacramental
          manduction}, {manduction}]
     2: sharing thoughts and feelings [syn: {sharing}]
     3: (Christianity) a group of Christians with a common religious
        faith who practice the same rites