deadbolt

[ded-bohlt] /ˈdɛdˌboʊlt/

noun

a lock bolt that is moved into position by the turning of a knob or key rather than by spring action.

Also called deadlock.

Origin

Examples from the web for deadbolt

deadbolt locks are only as good as the door and frame they are installed in.
May be keyed entry lock with deadbolt, or stand-alone card reader lock.
Every door should be secured with a single-cylinder deadbolt lock.
It is the same as the single cylinder deadbolt, except the keyway on both sides of the door.
Use single deadbolt locks with inside thumb turns wherever possible.
Beef up the door or cover and install a deadbolt lock or a strong hasp and padlock.
There was conflicting testimony as to whether this deadbolt was usually locked.
Any deadbolt must be interlocked with the handle so that it retracts at the same time that the handle is used to open the door.