deadbolt
B2Informal/Technical
Definition
Meaning
A type of lock for a door that is bolted or latched shut by turning a knob or key without a spring mechanism.
A secondary, more secure lock that operates by sliding a solid metal bolt horizontally into the door frame. Can also refer to the act of securing something firmly and irrevocably.
Linguistics
Semantic Notes
Primarily a noun referring to a physical locking device. The verb form, meaning to lock with such a bolt, is less common. Implies a higher level of security than a simple spring-latch lock.
Dialectal Variation
British vs American Usage
Differences
The term is used in both varieties, but 'deadlock' is a more common synonym in British English, especially in formal contexts. In American English, 'deadbolt' is the dominant term.
Connotations
In both varieties, it connotes solidity, security, and a lack of mechanical give (dead = without spring action).
Frequency
More frequent in American English due to its status as the standard term. In British English, 'deadlock' may be equally or more frequent.
Vocabulary
Collocations
Grammar
Valency Patterns
VERB + deadbolt: install/fit/throw/slide the deadboltADJ + deadbolt: sturdy/heavy/keyed/decorative deadboltVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “(as) solid as a deadbolt”
- “deadbolt it shut (figurative, for finalising)”
Usage
Context Usage
Business
Rare, except in contexts like security hardware sales or property management ('The lease requires a deadbolt on all exterior doors').
Academic
Rare, potentially in engineering or criminology texts discussing security mechanisms.
Everyday
Common in discussions of home improvement, security, and safety ('Don't forget to lock the deadbolt when you leave').
Technical
Standard in locksmithing, hardware, and home security industries, with specific types (single-cylinder, double-cylinder).
Examples
By Part of Speech
verb
British English
- He deadlocked the door before going to bed.
- Make sure you deadlock it from the inside.
American English
- She deadbolted the door before going to bed.
- You should deadbolt the garage at night.
adverb
British English
- (Extremely rare; no standard adverbial use)
American English
- (Extremely rare; no standard adverbial use)
adjective
British English
- The deadlock mechanism was jammed.
- We offer deadlock installation services.
American English
- The deadbolt lock was pick-resistant.
- It's a deadbolt-only system, no latches.
Examples
By CEFR Level
- The door has a lock and a deadbolt.
- Please lock the deadbolt.
- For extra security, we installed a new deadbolt on the front door.
- You need a key to open the deadbolt from the outside.
- The burglar attempted to force the deadbolt but failed due to its reinforced strike plate.
- Insurance policies often mandate the use of deadbolts on external doors.
- The forensic analysis indicated the deadbolt had been engaged at the time of the incident, suggesting the perpetrator had a key.
- Architectural specifications called for Grade 1 commercial deadbolts on all egress doors.
Learning
Memory Aids
Mnemonic
Think: 'dead' = no movement (no spring), 'bolt' = a sliding bar. A DEADBOLT is a solid, unmoving bar that locks a door.
Conceptual Metaphor
SECURITY IS SOLIDITY / FINALITY IS A LOCKED BOLT (e.g., 'The decision was deadbolted – no going back').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'мёртвый болт' (literal gibberish).
- The correct equivalent is 'засов' or 'врезной замок'. 'Щеколда' is a latch, not a deadbolt.
Common Mistakes
- Using 'deadlock' and 'deadbolt' interchangeably in all contexts (regional preference matters).
- Misspelling as 'deadbold'.
Practice
Quiz
Which of the following is the PRIMARY characteristic of a deadbolt?
FAQ
Frequently Asked Questions
A regular door lock often uses a spring-latch that can be 'jimmied' open with a credit card. A deadbolt has a solid metal bolt that slides horizontally into the door frame, offering much greater resistance to forced entry.
Yes, especially in American English (e.g., 'Deadbolt the door'). In British English, 'deadlock' is more commonly used as the verb.
In practical, everyday usage for describing hardware, they are often used interchangeably. However, 'deadbolt' is the specific hardware term in American English, while 'deadlock' can be that or a more general British term. 'Deadlock' also has a common metaphorical meaning (a stalemate).
Yes. Common types include single-cylinder (key outside, thumb turn inside) and double-cylinder (key required on both sides, for doors with glass panels). There are also vertical deadbolts and those with various security ratings (Grade 1 being the strongest).
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