the date by or on which something is expected, especially the payment of a bill or the birth of a baby （尤指欠款的）到期日，满期日 If payment is not made by the due date, 10% will be added to the bill. 如果到期不付款，还款金额将增加 10%。 When's your due date? (= When is your baby expected?) 您的到期日是什么时候？ The baby was born exactly on its due date. 婴儿就在预产期那一天出生了。