noun
- the act of excommunicating.
- the state of being excommunicated.
- the ecclesiastical sentence by which a person is excommunicated.
mid-15c., from Late Latin excommunicationem (nominative excommunicatio), from past participle stem of excommunicare “put out of the community,” in Church Latin “to expel from communion,” from ex- “out” (see ex-) + communicare, from communis “common” (see common).