#lock.holdfast  a fastener fitted to a door or drawer to keep it firmly closed
  supertype:  holdfast__fastener__fastening  restraint that attaches to something or holds something in place
  subtype:  combination_lock  cylinder_lock  doorlock  door_latch  lever_lock  padlock  sash_fastener
  part of:  door  drawer  gate  lid
  part:  deadbolt__bolt  the part of a lock that is engaged or withdrawn with a key
  part:  keyhole  the hole where a key is inserted
  part:  tumbler.obstructor  a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown

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