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单词 bolt
释义

bolt

noun
/bəʊlt/
/bəʊlt/
Idioms
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  1. enlarge image
    a long, narrow piece of metal that you slide across the inside of a door or window in order to lock it
    • He slid back the bolt on the door.
    Oxford Collocations Dictionaryverb + bolt
    • draw back
    • pull back
    • slide back
    • …
    See full entry
  2. a piece of metal like a thick nail without a point which is used with a circle of metal (= a nut) to fasten things together
    • nuts and bolts
    Topics Engineeringc2
    Oxford Collocations Dictionaryverb + bolt
    • tighten
    • tighten up
    • loosen
    • …
    phrases
    • nuts and bolts
    See full entry
  3. bolt of lightning a sudden flash of lightning in the sky, appearing as a lineTopics Weatherc2
  4. a short heavy arrow shot from a crossbow
  5. a long piece of cloth wound in a roll around a piece of cardboard
    6. Word Originnoun senses 1 to 4 Old English, ‘arrow’, of unknown origin; related to Dutch bout and German Bolzen ‘arrow, bolt for a door’. noun sense 5 Middle English: transferred use of bolt ‘metal pin’.
Idioms
a bolt from the blue
  1. an event or a piece of news which is sudden and unexpected; a complete surprise
    • Her dismissal came as a bolt from the blue.
have shot your bolt
  1. (informal) to have used all your power, money or supplies
make a bolt for something | make a bolt for it
  1. to run away very fast, in order to escape
    • The pony suddenly made a bolt for freedom.
the nuts and bolts (of something)
  1. (informal) the basic practical details of a subject or an activity
    • The documentary focuses on the real nuts and bolts of the film-making process.

bolt

verb
/bəʊlt/
/bəʊlt/
Verb Forms
present simple I / you / we / they bolt
/bəʊlt/
/bəʊlt/
he / she / it bolts
/bəʊlts/
/bəʊlts/
past simple bolted
/ˈbəʊltɪd/
/ˈbəʊltɪd/
past participle bolted
/ˈbəʊltɪd/
/ˈbəʊltɪd/
-ing form bolting
/ˈbəʊltɪŋ/
/ˈbəʊltɪŋ/
Idioms
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  1. [transitive, intransitive] bolt (something) to fasten something such as a door or window by sliding a bolt across; to be able to be fastened in this way
    • Don't forget to bolt the door.
    • The gate bolts on the inside.
    • Make sure that the rails are securely bolted in place.
    Oxford Collocations Dictionaryadverb
    • firmly
    • securely
    • together
    • …
    preposition
    • to
    See full entry
  2. [transitive] to fasten things together with a bolt
    • bolt A to B The vice is bolted to the workbench.
    • bolt A and B together The various parts of the car are then bolted together.
    Extra Examples
    • The two parts are bolted together.
    • The yacht's keel is bolted to the hull.
    Topics Engineeringc2
    Oxford Collocations Dictionaryadverb
    • firmly
    • securely
    • together
    • …
    preposition
    • to
    See full entry
  3. [intransitive] if an animal, especially a horse, bolts, it suddenly runs away because it is frightened
    • Bonnie the mare broke free and bolted.
    • The plane swooped down low and the horses bolted.
  4. [intransitive] (+ adv./prep.) (of a person) to run away, especially in order to escape
    • When he saw the police arrive, he bolted down an alley.
    Extra Examples
    • For a moment I thought about bolting, but there was no escape.
    • She bolted through the open door.
    • They turned and bolted off down the stairs.
  5. [transitive] bolt something (down) to eat something very quickly
    • Don't bolt your food!
  6. (North American English) [transitive, intransitive] bolt (something) to stop supporting a particular group or political party
    • Many Democrats bolted the party to vote Republican.
  7. [intransitive] (of a plant, especially a vegetable) to grow too quickly and start producing seeds and so become less good to eat
    8. Word Originverb senses 1 to 2 Old English, ‘arrow’, of unknown origin; related to Dutch bout and German Bolzen ‘arrow, bolt for a door’. verb senses 3 to 7 Middle English: from the other verb senses of bolt, expressing the sense ‘fly like an arrow’.
Idioms
close, lock, etc. the stable door after the horse has bolted (British English)
(North American English close, lock, etc. the barn door after the horse has escaped)
  1. to try to prevent or avoid loss or damage when it is already too late to do so

bolt

adverb
/bəʊlt/
/bəʊlt/
 Idioms
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Idioms
sit/stand bolt upright
  1. to sit or stand with your back straightTopics Appearancec2
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更新时间：2024/11/15 6:41:28