n. [ LL. ] One who bears testimony or swears to the veracity or innocence of another. See Purgation; also Wager of law, under Wager. [ 1913 Webster ]

All they who know me . . . will say they have reason in this matter to be my compurgators. Chillingworth. [ 1913 Webster ]

a. Relating to a compurgator or to compurgation. “Their compurgatorial oath.” Milman. [ 1913 Webster ]