Definition of excommunicate verb from the Oxford Advanced American Dictionary

 

excommunicate

 verb
verb
NAmE//ˌɛkskəˈmyunəˌkeɪt//
 
excommunicate somebody (for something)Verb Forms present simple I / you / we / they excommunicate
 
he / she / it excommunicates
 
past simple excommunicated
 
-ing form excommunicating
 
 
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to punish someone by officially stating that they can no longer be a member of a Christian Church, especially the Roman Catholic Church
excommunication
 
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NAmE//ˌɛkskəˌmyunəˈkeɪʃn//
 
noun [uncountable, countable] They were threatened with excommunication.
See the Oxford Advanced Learner's Dictionary entry: excommunicate