Help or support; an auxiliary. To aid or support. (Law) Corroborative or explanatory proof. In Scots law, any writing tending to establish the existence or terms of a lost deed. A term, in the Scotch and French law, for any writing or deed referred to by a party, in an action at law, for proving his allegations. An ancient term for aid or support. A term in the civil, law for imperfect proof.