DEF: Money given back to you when you return something you bought.
EX: 1. We will refund you 100% of the purchase price if you are not happy with the jacket 2. If you pay more for taxes than you owe, the government will give you a refund.
Merriam-Webster Online Dictionary
refund (verb)transitive verb
1.
to give or put back
2.
to return (money) in restitution, repayment, or balancing of accounts
1.
the act of - refunding
2.
a sum - refunded
transitive verb
to fund again