DAILY UPDATED VOCABULARY WITH PICTURES. BOLT.

• bolt [countable]
• 1

  lock

   a metal bar that you slide across a door or window to fasten it
• 2

  screw

   a screw with a flat head and no point, for fastening things together
• 3

  a bolt from (out of) the blue

   news that is sudden and unexpected:
• Was this money a bolt from the blue or did you know you were going to get it?
• 4

  bolt of lightning

   lightning that appears as a white line in the sky:
• There's not much left of his house after it was struck by a bolt of lightning.
• ➔ thunderbolt
• 5

  make a bolt for it

  British English to suddenly try to escape from somewhere:
• They attacked the driver and he straightaway made a bolt for it.
• 6

  weapon

   a short heavy arrow that is fired from a crossbow
• 7

  cloth

   a large long roll of cloth

• ➔ have shot your bolt

  at shoot1 (24)

  ; ➔ the nuts and bolts of something

  at nut1 (6)

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.