money returned to a payer
"After I realized my size was wrong, the store issued a full refund to my credit card."
An amount of money returned.
"I finally received my full refund for the defective headphones last week."
In plain English: A refund is money that a store gives back to you after you return something you bought.
"The store issued a full refund for the damaged item."
To return (money) to (someone); to reimburse.
"The customer waited three business days for her refund after returning the faulty headphones."
In plain English: To refund something means to give money back to someone who paid for it.
"The store promised to refund my money if I returned the damaged item."
Usage: Use refund as a transitive verb when you are returning money directly to someone, such as in the phrase "The store will refund your payment." It is often confused with rebate or reimbursement, but specifically implies giving back funds that were previously paid for goods or services.
The word "refund" comes from the Old French refunder, which meant to restore or pay back. It entered English via Middle English as a combination of Latin roots meaning "again" and "to pour."