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Synonyms

deadbolt

American  
[ded-bohlt] / ˈdɛdˌboʊlt /

noun

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


Etymology

Origin of deadbolt

dead + bolt 1

Explanation

A deadbolt is a type of lock that you need a key to open. It's very common to have a deadbolt on an apartment door or the front door of a house. When you turn a key in the lock of a deadbolt, the bolt slides in or out of an opening in the door jamb. Deadbolts are considered to be secure locks that are difficult to open without a key, especially when compared to a spring-loaded lock, the kind you see in the center of a doorknob. While spring latches can be pushed back manually, deadbolts can't — which is why they're called deadbolts. They're dead, or unmovable.

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Vocabulary lists containing deadbolt

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For the two months that federal agents have been conducting immigration raids in Minneapolis, Ana, Carlos and their son Luis have locked themselves in at home, feeling trapped behind their own deadbolt.

From Barron's • Feb. 1, 2026

Why it's important: MFA is like having a deadbolt in addition to your regular lock.

From Salon • Aug. 27, 2024

The San Francisco-based nonprofit, which began operating the shelter in 2021, claimed it had painted the outside of the hotel and removed deadbolt locks, but no work was actually performed, officials said.

From Los Angeles Times • May 7, 2024

The company says the lock is compatible with most deadbolt locks, and it comes with three different-sized thumb turns to fit a variety of designs.

From The Verge • Jun. 15, 2022

Our back door has a captive double-cylinder nickel-silver deadbolt, but my dad has complained that the door frame isn’t thick enough.

From "Dry" by Neal Shusterman and Jarrod Shusterman