Voucher meaning : A piece of paper that entitles the holder to a discount, or that can be exchanged for goods and services. A receipt. One who or that which vouches. A copy of a published advertisement sent by the agency to the client as proof of publication. A mechanical device used in shops for automatically registering the amount of money drawn. To establish the authenticity of; to vouch for. To provide a vouch for (an expenditure). To provide (a beneficiary) with a voucher.