air lock: meaning, definition, pronunciation and examples
C2Technical/Formal
Quick answer
What does “air lock” mean?
A sealed compartment with adjustable air pressure, used to allow passage between areas of different pressure (e.
Audio
Pronunciation
Definition
Meaning and Definition
A sealed compartment with adjustable air pressure, used to allow passage between areas of different pressure (e.g., between a spacecraft and outer space, or between the outside and an underwater or pressurised environment).
1. A trapped bubble of air in a pipe or system (e.g., plumbing, central heating) that blocks the flow of liquid. 2. In architecture/biophilic design, a transitional entry space (often with plants) to improve air quality between outside and inside environments.
Dialectal Variation
British vs American Usage
Differences
No major differences in definition. Spelling: 'air lock' (two words) is standard in both, though 'airlock' (one word) is also commonly accepted, especially in technical contexts.
Connotations
Identical core technical connotations. The plumbing issue might be more commonly called an 'air lock' in UK domestic contexts.
Frequency
Higher frequency in technical/scientific registers in both regions. The architectural use is slightly more discussed in US sustainable design circles.
Grammar
How to Use “air lock” in a Sentence
[subject] passes through the air lock[subject] cycles/operates the air lock[subject] is sealed in the air lockAn air lock forms/blocks [object]Vocabulary
Collocations
Examples
Examples of “air lock” in a Sentence
verb
British English
- The engineers had to air-lock the contaminated section before repairs.
American English
- The procedure is to airlock the module before depressurization.
adverb
British English
- [Virtually no standard adverbial use]
American English
- [Virtually no standard adverbial use]
adjective
British English
- The air-lock mechanism failed during the simulation.
American English
- We followed the airlock protocol meticulously.
Usage
Meaning in Context
Business
Rare, except in aerospace, engineering, or construction companies dealing with controlled environments.
Academic
Common in engineering, physics, aerospace, and environmental design papers.
Everyday
Low frequency. Might be used when discussing home plumbing problems or in science fiction media.
Technical
Core term in aerospace, submarine operations, hyperbaric medicine, hazardous material handling, and fluid dynamics.
Vocabulary
Synonyms of “air lock”
Vocabulary
Antonyms of “air lock”
Watch out
Common Mistakes When Using “air lock”
- Using 'airlock' incorrectly for a simple door or seal that doesn't control pressure. Misidentifying a blocked pipe caused by debris as an 'air lock'.
- Pronouncing it as two fully stressed words: /ˈeə ˈlɒk/. The primary stress is on 'air', with secondary stress on 'lock'.
FAQ
Frequently Asked Questions
Both are correct. 'Airlock' (one word) is very common, especially in technical writing. Dictionaries often list both, with 'air lock' as the headword.
An air bubble is simply a pocket of air. An 'air lock' specifically refers to a bubble that is trapped in a way that it blocks the flow of liquid in a pipe or system.
No, not in the standard sense. The medical term for a dangerous air bubble in the bloodstream is an 'air embolism'. 'Air lock' is not used in this context.
The term is borrowed from canal or waterway locks, which are chambers that raise or lower boats between different water levels by controlling water flow. An air lock similarly controls air pressure to allow transition between different pressure levels.
A sealed compartment with adjustable air pressure, used to allow passage between areas of different pressure (e.
Air lock is usually technical/formal in register.
Air lock: in British English it is pronounced /ˈeə lɒk/, and in American English it is pronounced /ˈer lɑːk/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[None directly related. Figurative use: 'He felt like he was in an emotional air lock, trapped between two states.']”
Learning
Memory Aids
Mnemonic
Think of an AIR LOCK as a LOCK for AIR. It LOCKS in the normal air pressure so you can safely pass into a place with no air (space) or different air (underwater).
Conceptual Metaphor
A BRIDGE or BUFFER ZONE between incompatible environments. A SAFETY VALVE for transition.
Practice
Quiz
In which of these situations is an 'air lock' LEAST likely to be used?