Origin of compurgatorML: see compurgation
- (now historical, law) A character witness in canon law who swore an oath that the accused was innocent.
- (historical, law) An ‘oath-helper’ in Anglo-Saxon or Germanic law who testified to the character of an accused person.
- More generally, someone who vouches for another person's innocence, trustworthiness etc.
From Medieval Latin compurgator or Middle French compurgateur, from Latin to purify.