柯林斯词典biplane /ˈbaɪˌpleɪn/ (biplanes) 1. N-COUNT A biplane is an old-fashioned type of aeroplane with two pairs of wings, one above the other. 雙翼飛機 返回 biplane剑桥词典an old type of aircraft with two sets of wings , one above the other 雙翼飛機 比較monoplane 返回 biplane