deadbolt

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Noun

deadbolt (plural deadbolts)

1. The part of the lock which is moved when the key is engaged.
2. A kind of lock in which the bolt (moving portion) is held in position by the cylinder rather than by a spring and so can not be retracted except by turning the cylinder.

Verb

deadbolt (deadbolts, present participle deadbolting; past and past participle deadbolted)

1. (transitive) To fasten or secure with a deadbolt.

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