*fly² n [C] 1 a common small insect with two wings 苍蝇: There were flies all over the food. 食物上满是苍蝇。 2 also 又作 fliesBrE 【英】 the ZIP or row of buttons at the front of a pair of trousers 〔裤子前面的〕拉链; 一排钮扣: Your fly is unzipped. 你的裤子拉链没拉上。 → see also 另见 sb wouldn't hurt a fly (HURT¹), let fly (LET)