单词	bolt
释义	noun | verb | adverb boltbolt1 /boʊlt/ ●●○ noun [countable] Etymology ETYMOLOGYbolt1 Origin: Old English short arrow Collocations COLLOCATIONS► came as a bolt from the blue  The attack on the airbase came as a bolt from the blue. 1LOCK a metal bar that you slide across a door or window to lock it2SCREW a screw with a flat top and no point, for fastening two pieces of metal together3a bolt of lightning/a lightning bolt lightning that appears as a white line in the sky → see also thunderbolt4a bolt from the blue/a bolt out of the blue something that happens very suddenly and without warning:  The attack on the airbase came as a bolt from the blue.5CLOTH a large long roll of cloth6GUN a short metal bar that you slide into the barrel of a gun to load bullets and hold them in place7WEAPON a short heavy arrow that is fired from a crossbow[Origin: Old English short arrow] → see also the nuts and bolts of something at nut (5) noun | verb | adverb boltbolt2 ●○○ verb Verb Table VERB TABLE bolt Simple Form Present I, you, we, they bolt he, she, it bolts Past I, you, he, she, it, we, they bolted Present perfect I, you, we, they have bolted he, she, it has bolted Past perfect I, you, he, she, it, we, they had bolted Future I, you, he, she, it, we, they will bolt Future perfect I, you, he, she, it, we, they will have bolted Continuous Form Present I am bolting he, she, it is bolting you, we, they are bolting Past I, he, she, it was bolting you, we, they were bolting Present perfect I, you, we, they have been bolting he, she, it has been bolting Past perfect I, you, he, she, it, we, they had been bolting Future I, you, he, she, it, we, they will be bolting Future perfect I, you, he, she, it, we, they will have been bolting Thesaurus THESAURUSmove quickly on foot► run a) to move very quickly, by moving your legs more quickly than when you walk:  If we run, we can still catch the bus. He ran for his life as bullets flew around him (=to avoid being killed).b) to move in this way as a sport or for exercise:  I run every morning. ► jog to run at a slow steady speed for exercise:  It takes a half an hour to jog around the lake. ► sprint to run as fast as you can for a short distance:  I sprinted toward the end zone and got the touchdown. ► dash to run somewhere, usually a short distance, because you are in a hurry:  She dashed across the street to catch the bus. ► tear to run somewhere very fast, especially in a dangerous or careless way:  The dog came tearing across the backyard at me, and I screamed. ► dart to run suddenly in a particular direction:  A rabbit darted across the trail in front of us. ► race to run somewhere very quickly, especially because it is important that you get somewhere:  She raced up the stairs when she heard the scream. ► bolt to suddenly run somewhere very fast, especially in order to escape or because you are frightened:  At the sound of the siren, the men bolted for the door. ► scurry to run quickly with small steps, especially because you are nervous or afraid:  Occasionally a cockroach would scurry across the floor. ► scamper to run quickly with quick short steps. Used about children or small animals:  Squirrels were scampering around the park. ► trot to run fairly slowly, taking short steps. Used especially about horses and dogs:  A little dog was trotting behind her. ► gallop to run very fast. Used about horses:  The horse started galloping down the hill. 1[intransitive] to suddenly run somewhere very quickly, especially in order to escape or because you are frightened:  The dog bolted into the road.► see thesaurus at run12[transitive] to lock a door or window by sliding a bolt across:  Jason bolted the door and closed all the curtains.3[transitive] (also bolt down) to fasten two things together using a bolt: bolt something to something A wrought-iron bench was bolted to the patio.4[transitive] (also bolt down) to eat very quickly SYN gobble:  He bolted down his breakfast.5bolt the party/team/country etc. to leave a political party, team, etc. noun | verb | adverb boltbolt3 adverb sit/stand bolt upright to sit or stand with your back very straight, often because something has frightened you:  We found her sitting bolt upright in bed with all the lights on.
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