rhizoverbBeta
DictionarylockSecure fastening or holding
noun / verb

lock

LAHK/lˈɑk/

Securing something so it cannot be freely opened, moved, or changed.

I lock the door by turning the key.

Close-up door lock with key entering keyhole.
Etymology
lockOld Englishbolt, fastening device

Old English loc already named a bolt or door-fastening appliance. The modern device preserves that concrete image: an internal bolt or bar catches in an opening to hold something shut.

In context

Evidence With John26:05
The local residents are left to wonder if the lock on their own door is truly enough to keep the unknown at bay.
Nancy Guthrie: Investigators Overlooked This Crucial Piece of Physical Evidence at the Scene

More examples

  • The seat locks into place with a click.
  • You can lock the file to prevent further changes.
  • A rate lock keeps our mortgage rate from changing.

Forms

lock · locks · locked · locking

padlock noun — a portable lock with a hinged loop

Similar words

secure
Secure is broader and can include tying or anchoring.
fasten
Fasten emphasizes attaching parts, not necessarily preventing movement or access.