柯林斯詞典biplane /?ba??ple?n/ (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劍橋詞典an old type of aircraft with two sets of wings , one above the other 雙翼飛機 比較monoplane 返回 biplane