ex ‧ com ‧ mu ‧ ni ‧ cate /ˌekskəˈmjuːnəkeɪt, ˌekskəˈmjuːnɪkeɪt/ BrE AmE verb [transitive]
[ Date: 1400-1500 ; Language: Late Latin ; Origin: past participle of excommunicare , from communicare ; ⇨ ↑ communicate ]
to punish someone by no longer allowing them to be a member of the Roman Catholic church
—excommunication /ˌekskəmjuːnəˈkeɪʃ ə n, ˌekskəmjuːnɪˈkeɪʃ ə n/ noun [uncountable and countable]