Definition of safety lock in English:

safety lock

Syllabification: safe·ty lock
(also safety catch)

noun

A device that prevents a gun from being fired or a machine from being operated accidentally.
More example sentences
  • A neat little safety lock on each lever prevents inadvertent release.
  • However the Presidio is a perfect twin with the exception of manual operation and no safety lock as is required on the Model 5000.
  • Well, as I described that case, a parent left the safe unlocked and didn't have a safety lock, and the kid takes the gun to school.

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