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Definitions

IOU

NOUN
promissory note
Synonyms


I.O.U.
NOUN
debenture
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Essentially, you borrow from the account and create an IOU to yourself.

From MarketWatch • Jan. 14, 2026

Credit is the promise to pay money, an IOU.

From The Wall Street Journal • Dec. 12, 2025

If the players acknowledge the worth of the IOU and its holder bets it as if it were cash, it must be accepted at face value by the pot’s winner.

From The Wall Street Journal • Nov. 6, 2025

A bond is essentially an IOU - in return for an investor buying the bond and lending money, governments pay interest.

From BBC • Apr. 18, 2025

On the shore was a canoe rental operation that was closed for the season, but I left a stack of golden drachmas on the counter and a note saying IOU two canoes.

From "The Titan's Curse" by Rick Riordan