Purgation

The act of cleansing or exonerating one's self of a crime, accusation or suspicion of guilt, by denying the charge on oath or by ordeal. Canonical purgation was made by the party's inking his own oath that he was innocent of the charge, which was supported by the oath of twelve compurgators, who swore they believed he spoke the truth. To this succeeded the mode of purgation by the single oath of the party himself, called the "oath ex officio," of which the modern defendant's oath in chancery is a modification.

3 Bl, Comm. 447; 4 Bl. Comm. 368.

Vulgar purgation consisted in ordeals or trials by hot and cold water, by fire, by hot irons, by battel, by corsned, etc.