debt instrumentglossary / DEBT INSTRUMENT debt instrument. A written promise to repay a debt, such as a promissory note, bill, bond, or commercial paper. [Cases: Bills and Notes 28. C.J.S. Bills and Notes; Letters of Credit§§ 2–3, 7–9, 12, 22, 75.] 词条贡献者 法律翻译Cathy,在一家英国银圈所担任专职法律翻译,擅长翻译有关城市基础设施领域的法律文件。