See also: iou and -ioù

English edit

Etymology edit

From the pronunciation of "I owe you". Attested since at least 1618.

Phrase edit


  1. I owe you.
    Customarily, if you borrow $10 for lunch from a coworker, writing IOU $10 on a yellow sticky note acts as a legal promissory note that you will repay said amount on payday.

Noun edit

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.

Translations edit

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