Meaning of counterfoil

coun•ter•foil

Pronunciation: (koun'tur-foil"), [key]
— n. Chiefly Brit.
  1. a part of a bank check, money order, etc., that is kept by the issuer and on which a record of the transaction is made; stub.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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