Longman Dictionary English From Longman Business DictionaryRelated topics: Finance, Bankingidle balanceˌidle ˈbalance British EnglishBANKINGACCOUNTING money kept in a bank account that does not pay interest, for example a CURRENT ACCOUNTAs interest rates begin to rise, people choose to hold fewer idle balances. → balance ldoceonline.com