mortise lock: meaning, definition, pronunciation and examples
B2/C1Technical, formal, professional (construction, hardware, locksmithing). Also used in general descriptions of property features.
Quick answer
What does “mortise lock” mean?
A lock that fits into a mortise (a cavity or recess cut into a door edge or frame), with the bolt mechanism contained within the thickness of the door.
Audio
Pronunciation
Definition
Meaning and Definition
A lock that fits into a mortise (a cavity or recess cut into a door edge or frame), with the bolt mechanism contained within the thickness of the door.
A robust, high-security type of lock typically used in residential and commercial doors, known for its strength as it is embedded within the door structure rather than surface-mounted.
Dialectal Variation
British vs American Usage
Differences
Spelling: In British English, 'mortise' is standard, but 'mortice' is also an accepted, common variant (e.g., 'mortice lock'). In American English, only 'mortise' is used. The term is equally understood in both varieties in professional contexts.
Connotations
Connotes security, quality, and traditional craftsmanship in both varieties. In UK property listings, it is a standard term for describing door security.
Frequency
More frequent in British English due to its prevalence in UK building standards and property descriptions. In American English, terms like 'deadbolt' or 'bore-in lock' may be more common in everyday speech, but 'mortise lock' is the precise technical term.
Grammar
How to Use “mortise lock” in a Sentence
The [DOOR] has a mortise lock.We need to [VERB: fit/install/replace] a mortise lock.The mortise lock is [ADJECTIVE: secure/broken/stuck].Vocabulary
Collocations
Examples
Examples of “mortise lock” in a Sentence
verb
British English
- The carpenter will mortise the lock into the door stile.
- The door needs to be mortised for the new lock.
American English
- We need to mortise the door to install this lock.
- The frame was mortised precisely for the hardware.
adverb
British English
- N/A (Not standardly used as an adverb)
American English
- N/A (Not standardly used as an adverb)
adjective
British English
- It's a mortise-lock fitting.
- The mortise lock mechanism is jammed.
American English
- We offer mortise-lock installation services.
- Check the mortise lock cylinder.
Usage
Meaning in Context
Business
In property management and security hardware sales.
Academic
In architecture, building technology, or historical preservation texts.
Everyday
When discussing home security, door repairs, or describing a property.
Technical
Detailed specifications in carpentry, locksmithing, and building regulations.
Vocabulary
Synonyms of “mortise lock”
Strong
Neutral
Weak
Vocabulary
Antonyms of “mortise lock”
Watch out
Common Mistakes When Using “mortise lock”
- Misspelling as 'mortice lock' in US contexts or 'morticelock'. Using it to refer to any door lock. Pronouncing 'mortise' as /mɔːrˈtaɪz/.
FAQ
Frequently Asked Questions
A mortise lock often contains a deadbolt as part of its mechanism. The mortise design itself is considered very secure because the lock case is embedded deep within the door, making it harder to force. Security depends on the lock's quality (e.g., number of levers) more than just the type.
It is possible for a skilled DIYer with the right tools, but it requires precision woodworking to cut the mortise (pocket) accurately. Improper installation compromises security. For most people, hiring a carpenter or locksmith is recommended.
A deadlock is a lock whose bolt can only be moved by a key (it has no spring latch). A mortise lock is defined by its installation method. Many mortise locks contain a deadbolt mechanism, but they can also include a sprung latch for convenience.
UK door construction (often using thicker, solid wood doors) has historically favoured mortise locks. US residential doors are frequently hollow-core or of different construction, more suited to cylindrical (bore-in) locksets. Mortise locks are common in US commercial buildings.
A lock that fits into a mortise (a cavity or recess cut into a door edge or frame), with the bolt mechanism contained within the thickness of the door.
Mortise lock is usually technical, formal, professional (construction, hardware, locksmithing). also used in general descriptions of property features. in register.
Mortise lock: in British English it is pronounced /ˈmɔː.tɪs ˌlɒk/, and in American English it is pronounced /ˈmɔːr.t̬ɪs ˌlɑːk/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “As secure as a mortise lock.”
Learning
Memory Aids
Mnemonic
Think of a MOUSE (mortise sounds similar) that needs a special HOLE in the door to live; the lock lives in that hole.
Conceptual Metaphor
SECURITY IS DEPTH (embedded within, not just on the surface).
Practice
Quiz
What is the primary distinguishing feature of a mortise lock?