bolt /bəult/ I. n. ［c］ 1.(门窗)插销： Is the bolt on the door closed? 门上的插销插上了吗? 2.螺栓: The engine is held in place by two strong bolts. 发动机是用两个大螺栓固定在那儿的。‖II.vt.& vi. 插上(门，窗)：bolt the door (window) 把门(窗)插上 The door bolts on the inside. 门是在里边插上的。