ex ‧ or ‧ cis ‧ m /ˈeksɔːsɪz ə m $ -ɔːr-/ BrE AmE noun [uncountable and countable]
1 . a process during which someone tries to make an evil ↑ spirit leave a place by saying special words, or a ceremony when this is done
2 . literary the process of making yourself forget a bad memory or experience