Demonology and religion-related term. Basically, the exorcist (often a priest or member of the clergy) tries to chase demons away from places, objects or persons possessed by the devil.

Also see info on the movie The Exorcist.

Ex"orcist (?), n. [L. exorcista, Gr. : cf. F. exorciste.]

1.

One who expels evil spirits by conjuration or exorcism.

Certain of the vagabond Jews, exorcists. Acts xix. 13.

2.

A conjurer who can raise spirits.

[R.]

Thou, like an exorcist, hast conjured up My mortified spirit. Shak.

 

© Webster 1913.