'IOU' definitions:
Definition of 'IOU'
From: WordNet
noun
An informal debt instrument; representing `I owe you'
Definition of 'IOU'
From: GCIDE
- I O U \I O U\, IOU \I.O.U\([imac]" [=o]" [=u]"). [phonetic, from I owe you.] A paper having on it these letters, with a sum named, and duly signed; -- in use in England as an acknowledgment of a debt, and taken as evidence thereof, but not amounting to a promissory note; a due bill. --Wharton. --Story. [1913 Webster]
Synonyms of 'IOU'
From: Moby Thesaurus
- acceptance,
- acceptance bill,
- bank acceptance,
- bank check,
- bill,
- bill of draft,
- bill of exchange,
- blank check,
- CD,
- certificate,
- certificate of deposit,
- certified check,
- check,
- checkbook,
- cheque,
- commercial paper,
- debenture,
- demand bill,
- demand draft,
- draft,
- due bill,
- exchequer bill,
- letter of credit,
- MO,
- money order,
- negotiable instrument,
- note,
- note of hand,
- paper,
- postal order,
- promissory note,
- sight bill,
- sight draft,
- time bill,
- time draft,
- trade acceptance,
- treasury bill,
- voucher,
- warrant