Mental illness in which the patient believes himself or herself to be possessed by an evil spirit; (also) illness attributed by onlookers to demonic possession; an instance of this.
Origin
Mid 19th century. After French démonopathie.
Definition of demonopathy in US English:
demonopathy
noun
Mental illness in which the patient believes himself or herself to be possessed by an evil spirit; (also) illness attributed by onlookers to demonic possession; an instance of this.