Noun overpayment has 2 senses
  1. overpayment - a payment larger than needed or expected
    --1 is a kind of
    payment
    Derived form: verb overpay1
  2. overpayment - the act of paying too much
    --2 is a kind of
    payment, defrayal, defrayment
    Derived form: verb overpay1
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