To deprive of the right of church membership by ecclesiastical authority.
To exclude by or as if by decree from membership or participation in a group.
n.
(-kĭt) A person who has been excommunicated. adj.
(-kĭt, -kāt') Having been excommunicated.
[Middle English excommunicaten, from Late Latin excommūnicāre, excommūnicāt- : Latin ex-, ex- + Latin commūnicāre, to share (from commūnis, common; see common).] ex'com·mu'ni·ca'tive (-kā'tĭv, -kə-), ex'com·mu'ni·ca·to'ry (-kə-tôr'ē, -tōr'ē) adj., ex'com·mu'ni·ca'tor n.