Word.ws English Dictionary

I.O.U.

I.O.U. is the alternative form of IOU.

Meaning of IOU

Noun

IOU (plural IOUs)

  1. An informal promissory note that is not a negotiable instrument.
    • When David couldn’t afford to match the money in the poker pot, he added an IOU for the remaining amount instead.

See all 2 meanings of IOU

Forms of I.O.U.

pluralI.O.U.s

Questions about I.O.U.

What is I.O.U. the alternative form of?
I.O.U. is the alternative form of IOU.

Words near I.O.U. in the dictionary

  1. I.D.
  2. I.D.s
  3. i.e.
  4. i.i.d.
  5. i.m.
  6. I.O.U.
  7. I.O.U.s
  8. i.p.
  9. i.p.i.
  10. i.q.
  11. i.v.

Source and license

Adapted from Wiktionary: I.O.U. (page history and authors); IOU (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “I.O.U..” Word.ws, https://word.ws/i.o.u.. Based on Wiktionary, CC BY-SA 4.0.