The American Heritage® Dictionary of the English Language, 4th Edition
n. Communion, relationship, or association between persons or groups.
n. The practice by which members of different Christian denominations can receive Communion at one another's Eucharistic services or at a common service.
n. communion (association) between people or groups
n. The participation, together, in Holy Communion of people from different denominations
the GNU version of the Collaborative International Dictionary of English
n. Mutual communion.
The Century Dictionary and Cyclopedia
n. Communion one with another; intimate intercourse.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. participation in Holy Communion by members of more than one church (eg Catholic and Orthodox)
Word Usage
"– for a desire for intercommunion is one of the strong instincts of our nature, and yet it is one which, as regards all the rest of creation but our human fellow-beings, we have to unlearn from babyhood."