debt instrument debtful • debtless · · · Info · Definitions · Synonyms · Characters · · debt instrument · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) a written promise to repay a debt. Synonyms: debt instrument, obligation, certificate of indebtedness. · · Noun Definition 1 Synonyms · · · obligation · · Synonym 1 certificate of indebtedness · · Synonym 2 Characters · · space U+0020 b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075