1. A certificate or voucher acknowledging a debt. 2. An unsecured bond issued by a civil or governmental corporation or agency and backed only by the credit standing of the issuer. 3. A customhouse certificate providing for the payment of a drawback.
ETYMOLOGY:
Middle English debentur, from Latin dbentur, they are due (probably the first word appearing on certificates of indebtedness), third person pl. passive of dbre, to owe. See ghabh- in Appendix I.