Change (money returned after a purchase). The amount returned by a shop when you pay more than the price.
すみません、釣り銭を間違えて渡してしまいました。
Sorry, I gave you the wrong change.
千円札で払ったら、釣り銭は五百円でした。
I paid with a 1,000-yen bill, and the change was 500 yen.
釣り銭がないので小銭を両替してもらった。
I had no change, so I asked to have some coins exchanged.