From Longman Dictionary of Contemporary Englishpromissory noteprom‧is‧so‧ry note /ˈprɒməsəri ˌnəʊt $ ˈprɑːməsɔːri ˌnoʊt/ noun [countable] technical BFLa document promising to pay money before a particular date
Examples from the Corpus
promissory note• Richter also said Steve Adams had signed a promissory note for the $ 50,000.• A promissory note is like a post-dated cheque.From Longman Business Dictionarypromissory noteˈpromissory ˌnote (also P Note) [countable]FINANCE a document stating that someone promises to pay a particular sum of money on a certain datePromissory notes and bills of exchange are often guaranteed or endorsed by a third party. → note 