/ ˈeksɔːsɪzəm; NAmE -sɔːrs-/ noun [ U , C ]
1.
the act of getting rid of an evil spirit from a place or a person's body by prayers or magic; a ceremony where this is done
2.
( formal ) the act of making yourself forget a bad experience or memory
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WORD ORIGIN
late Middle English : via ecclesiastical Latin from ecclesiastical Greek exorkismos , from exorkizein exorcize.