Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun safety_lock

2 senses of safety lock

Sense 1
safety catch, safety lock -- (guard consisting of a locking device that prevents a weapon from being fired)
       => guard, safety, safety device -- (a device designed to prevent injury or accidents)

Sense 2
safety bolt, safety lock -- (a bolt that cannot be moved from outside the door or gate)
       => bolt, deadbolt -- (the part of a lock that is engaged or withdrawn with a key)