/bəʊlt; bolt/
n
1 metal bar that slides into a socket to lock a door, window, etc （门、窗等的）闩.
2 metal pin with a head at one end, and a thread (as on a screw), used with a nut for fastening things together 螺栓.
3 short heavy arrow shot from a crossbow （用弩弓发射的）弩箭.
4 flash of lightning 闪电; 霹雳.
5 quantity of cloth, etc wound in a roll （布疋等的量）一疋, 一卷.
6 (idm 习语) a ,bolt from the `blue unexpected (and usu unwelcome) event; complete surprise 意外的（通常为不受欢迎的）事件; 晴天霹雳
*The news of his death was (like) a bolt from the blue. 他逝世的消息犹如晴天霹雳. the nuts and bolts => nut. shoot one's bolt => shoot1.

v
1 (a) [I, Tn] fasten (sth) with a bolt1(1) 将（某物）闩上
*The gate bolts on the inside. 这大门是从里面闩上的.
* Remember to bolt all the doors and windows. 别忘将所有门窗闩住.
(b) [Tn, Tn.pr, Tn.p]. ~ A to B; ~ A and B (together) fasten objects (together) with bolts (bolt1 2) 用螺栓将物体固定住
*The vice is bolted to the work-bench. 老虎钳是用螺栓拧在工作台上的.
* The various parts of the car are bolted together. 这辆汽车的各种配件是用螺栓装在一起的.
2 (phr v) bolt sb in/out prevent sb from leaving/entering a room, house, etc by bolting the doors, etc 将门等闩上不让某人出[入].

/bəʊlt; bolt/
v
1 [I]
(a) (esp of a horse) run away suddenly out of control （尤指马）惊（突然失控逃跑）
*The horse bolted in terror at the sound of the gun. 枪声把马吓惊了.
(b) (of a person) run away quickly （指人）迅速逃跑
*When the police arrived the burglars bolted. 警察来到时, 窃贼立即逃跑了.
2 [Tn, Tn.p] ~ sth (down) swallow (food) quickly 匆匆吞咽（食物）
*Don't bolt your food you'll get indigestion! 别这么狼吞虎咽--你会消化不良的!
3 [I] (of plants) grow quickly upwards and stop flowering when seeds are produced （指植物）迅速成长结子而不再开花
*My lettuces have bolted. 我种的莴苣已经结子了.
4 (idm 习语) lock, etc the stable door after the horse has bolted => stable2.

n
1 [sing] act of bolting (bolt2 1b); sudden dash 逃跑; 猛冲.
2 (idm 习语) make a bolt/dash/run for it try to escape/to reach sth quickly 试图迅速逃走[抵达某处]
*When the police arrived he made a bolt for it/for the door. 警方来到时, 他慌忙逃走[夺门而逃]了.

/bəʊlt; bolt/
adv (idm 习语) bolt `upright very straight; quite upright 挺直地; 直立地
*sit bolt upright 挺直地坐着.