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Definition of bolt noun from the Oxford Advanced Learner's Dictionary

bolt

noun
 
/bəʊlt/
 
/bəʊlt/
Idioms
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  1. 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.
See bolt in the Oxford Advanced American Dictionary
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