excommunication

US /ˌek.skəˌmjuː.nəˈkeɪ.ʃən/
UK /ˌek.skəˌmjuː.nəˈkeɪ.ʃən/
1.

aforoz

the act of refusing to to allow someone to be involved in the Church, especially the Roman Catholic Church, and to take part in the ceremony of Communion:

:
They received warnings that they were in danger of excommunication.