safety lock

Definitions of safety lock
  1. noun
    a bolt that cannot be moved from outside the door or gate
    synonyms: safety bolt
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    type of:
    bolt, deadbolt
    the part of a lock that is engaged or withdrawn with a key
  2. noun
    guard consisting of a locking device that prevents a weapon from being fired
    synonyms: safety catch
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    type of:
    guard, safety, safety device
    a device designed to prevent injury or accidents
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