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Definition of 'lock'


  1. a fastener fitted to a door or drawer to keep it firmly closed
  2. a strand or cluster of hair
       Synonyms: curl ringlet whorl
  3. a mechanism that detonates the charge of a gun
  4. enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it
       Synonyms: lock chamber
  5. a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key
       Synonyms: ignition lock
  6. any wrestling hold in which some part of the opponent's body is twisted or pressured


  1. fasten with a lock; "lock the bike to the fence"
       Antonyms: unlock unlock
  2. keep engaged; "engaged the gears"
       Synonyms: engage mesh operate
       Antonyms: disengage withdraw
  3. become rigid or immoveable; "The therapist noticed that the patient's knees tended to lock in this exercise"
       Antonyms: unlock
  4. hold in a locking position; "He locked his hands around her neck"
       Synonyms: interlock interlace
  5. become engaged or intermeshed with one another; "They were locked in embrace"
       Synonyms: interlock
  6. hold fast (in a certain state); "He was locked in a laughing fit"
  7. place in a place where something cannot be removed or someone cannot escape; "The parents locked her daughter up for the weekend"; "She locked her jewels in the safe"
       Synonyms: lock in lock away put away shut up shut away lock up
  8. pass by means through a lock in a waterway
  9. build locks in order to facilitate the navigation of vessels

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