Legal Definition
A refund is a financial return of money to the original payer, typically when goods or services have been returned, or an obligation has been rescinded, resulting in the repayment of funds owed by the seller or service provider.
Plain-English Translation
Imagine you bought something and paid for it. If the item is faulty, or if you decide not to keep it, the refund means getting your money back from the store or company that sold you the item.