1
: a paper that has on it the letters IOU, a stated sum, and a signature and that is given as an acknowledgment of debt
2

Examples of IOU in a Sentence

I don't have any cash, so I'll have to give you an IOU.

Word History

Etymology

from the pronunciation of I owe you

First Known Use

1795, in the meaning defined at sense 1

Time Traveler
The first known use of IOU was in 1795

Dictionary Entries Near IOU

Cite this Entry

“IOU.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/IOU. Accessed 9 Dec. 2023.

Kids Definition

: a paper that has on it the letters IOU, a stated sum, and a signature and that is given to acknowledge a debt
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