Black's Law Dictionary (2nd edition)dictionaries

Prover

In old Englisb law. A person who, on being indicted of treason or fel ony, and arraigned for the same, confessed the fact before plea pleaded, and appealed or accused others, his accomplices, in the same crime, in order to obtain his pardon. 4 Bl. Comm. 329, 330

Source: Black’s Law Dictionary 2nd Ed (1910)