From Longman Dictionary of Contemporary Englishpart paymentpart paymentPARTpayment of only a part of something, not all of it I gave them £10 in part payment. → partFrom Longman Business Dictionarypart-paymentˌpart-ˈpayment (also partial payment) noun [countable, uncountable]ACCOUNTING a payment that is part of the total payment for somethingSYNPAYMENT ON ACCOUNTGift certificates can be used to purchase or as part-payment for any product in the shop.