IOU Meaning in the Cambridge English Dictionary
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Meaning of “IOU” in the English Dictionary

"IOU" in British English

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IOUnoun [C]

uk   /ˌaɪ.əʊˈjuː/  us   /-oʊˈ-/
abbreviation for I ​owe you: a written ​promise to ​pay back a ​debt: Here's an IOU for the ​fiver you ​lent me. I'll ​pay you back on ​Monday.
(Definition of IOU from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"IOU" in American English

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IOUnoun [C]

(plural IOUs or IOU’s)
abbreviation for I ​owe you (= a written ​promise to ​pay back ​moneyowed): I’ll give you an IOU for the ​loan.
(Definition of IOU from the Cambridge Academic Content Dictionary © Cambridge University Press)

"IOU" in Business English

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IOUnoun [C]

uk   us   /ˌaɪəʊˈjuː/ informal
abbreviation for I ​owe you: a written promise to ​pay back a ​debt: The New York ​agent now has an IOU for $1,000.
(Definition of IOU from the Cambridge Business English Dictionary © Cambridge University Press)
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