n. One who vouches, or gives witness or full attestation, to anything.n. A book, paper, or document which serves to vouch the truth of accounts, or to confirm and establish facts of any kind; also, any acquittance or receipt showing the payment of a debt.n. n. The act of calling in a person to make good his warranty of title in the old form of action for the recovery of lands.n. The tenant in a writ of right; one who calls in another to establish his warranty of title. In common recoveries, there may be a single voucher or double vouchers.n. A document attesting to a credit against certain defined expenditures; a recipt for prepayment; -- often used in pre-arranged travel plans, to provide evidence of pre-payment of the cost of lodging, transportation, or meals.