noun

deadbolt

deadbolt

He secured the door with a deadbolt.

He secured the door with a deadbolt.

The deadbolt provides extra security.

The deadbolt provides extra security.

a deadbolt a type of lock He secured the door with a deadbolt.

Synonyms: bolt, latch, lock

A combination of 'dead' (meaning fixed, not spring-loaded) and 'bolt' (a bar that slides to lock).

It's a 'dead' bolt because it doesn't move on its own with a spring; you have to turn a key or knob.

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