Definitions
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noun 
  1. A (usually) metal fastener consisting of a cylindrical body, partially or completely threaded, and a larger head; it is inserted into an unthreaded hole (unlike a screw) up to the head, and a nut is threaded on the other end.
  2. A slide, sliding pin or bar in a lock or latch mechanism.
  3. A bar of wood or metal dropped in hooks on a door and adjoining walls, or between the two sides of a double door, to prevent the door(s) from being forced open.
  4. A sliding mechanism to chamber and unchamber a round in a gun.
  5. A shaft or missile intended to be shot from a crossbow or a catapult, especially a short, stout, blunt-headed arrow.
  6. A lightning spark, i.e. lightning bolt: a bolt from the blue.
  7. A large roll of material, e.g. fabric: a bolt of cloth.
  8. (nautical) The standard measurement of length of canvas for use at sea; 39 yards
verb 
  1. To connect or assemble pieces using a bolt.
Bolt the vice to the bench.
  1. To secure a door by locking or barring it.
Bolt the door.
  1. To accelerate suddenly.
The horse bolted.
  1. To escape.
  2. Of a plant, to grow quickly; to go to seed.
Lettuce and spinach will as the weather warms up.
Etymology: From Proto-Germanic
  • bultas, perhaps from Proto-Indo-European base
  • bheld- "to knock, strike".



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