柯林斯詞典postal order (postal orders) 1. N-COUNT A postal order is a piece of paper representing a sum of money which you can buy at a post office and send to someone as a way of sending them money by mail. 郵政匯票[英國英語] 返回 postal order劍橋詞典an official piece of paper with an amount of money written on it that you can send or give to someone who can then exchange it for the same amount of money at a post office 郵政匯票 返回 postal order