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IOU

noun
🔊/ˌaɪ əʊ ˈjuː/
🔊/ˌaɪ əʊ ˈjuː/
 (informal)
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  1. a written promise that you will pay somebody the money you owe them (a way of writing ‘I owe you’)借据，欠条（表示 I owe you）
    • an IOU for £100100 英镑的借据
    Topics Moneyc2
    Word Originlate 18th cent.: representing the pronunciation of I owe you.