[] () a fund that is used by a business for making regular small payments定额备用金；定额周转金◆Each office holds an imprest for its running expenses.每一个办公室都设有供日常开支的定额周转金。◆an imprest account/fund定额备用金账户；定额备用金➡float , petty cash an amount of money that is given in advance to sb for a particular purpose预付款；垫款