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Definition of lock:

  1. A device for keeping a wheel from turning.
  2. A fastening together or interlacing; a closing of one thing upon another; a state of being fixed or immovable.
  3. A grapple in wrestling.
  4. A place from which egress is prevented, as by a lock.
  5. A tuft of hair; a flock or small quantity of wool, hay, or other like substance; a tress or ringlet of hair.
  6. An inclosure in a canal with gates at each end, used in raising or lowering boats as they pass from one level to another; - called also lift lock.
  7. Anything that fastens; specifically, a fastening, as for a door, a lid, a trunk, a drawer, and the like, in which a bolt is moved by a key so as to hold or to release the thing fastened.
  8. That part or apparatus of a firearm by which the charge is exploded; as, a matchlock, flintlock, percussion lock, etc.
  9. The barrier or works which confine the water of a stream or canal.
  10. To become fast, as by means of a lock or by interlacing; as, the door locks close.
  11. To fasten in or out, or to make secure by means of, or as with, locks; to confine, or to shut in or out -- often with up; as, to lock one's self in a room; to lock up the prisoners; to lock up one's silver; to lock intruders out of the house; to lock money into a vault; to lock a child in one's arms; to lock a secret in one's breast.
  12. To fasten with a lock, or as with a lock; to make fast; to prevent free movement of; as, to lock a door, a carriage wheel, a river, etc.
  13. To furnish with locks; also, to raise or lower ( a boat) in a lock.
  14. To link together; to clasp closely; as, to lock arms.
  15. To prevent ingress or access to, or exit from, by fastening the lock or locks of; - often with up; as, to lock or lock up, a house, jail, room, trunk. etc.
  16. To seize, as the sword arm of an antagonist, by turning the left arm around it, to disarm him.


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