In the civil law . Deceitful, crafty, or unfaithful conduct; particularly, such as is manifested in concealing a crime. Dig. 47, 15, 6. In English law . A collusion between an informer and a defendant, in order to a feigned prosecution . Cowell. Also any secret abuse committed in a public office or private commission ; also the willful concealment or misrepresentation of truth, by giv- ing evasive or equivocating evidence.