ˌnon-reˈfundable adjectiveadj a non-refundable amount of money cannot be paid back to you 不可偿还的；不能退款的 There is a £40 deposit, which is non-refundable. 有一笔40英镑的押金，是不能退还的。
non-refundable• Fees are non-refundable and subject to change at the school's discretion.• Nothing for her troubles except a $ 15 non-refundable service charge on her Visa card.
From Longman Business Dictionary
non-refundableˌnon-reˈfundable adjectiveadjCOMMERCE a non-refundable payment cannot be paid back to youA non-refundable deposit will be required in January.