propulsion: meaning, definition, pronunciation and examples
C1Formal / Technical
Quick answer
What does “propulsion” mean?
The act or process of driving or pushing something forward.
Audio
Pronunciation
Definition
Meaning and Definition
The act or process of driving or pushing something forward.
A force that propels or drives something; the technology or system used to create forward motion, especially in vehicles, aircraft, or spacecraft.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling. Slight preference for 'propulsion' in military/naval contexts in UK English ('propulsion unit').
Connotations
Neutral technical term in both. Connotes engineering, physics, aerospace.
Frequency
Equally uncommon in everyday speech in both variants; high frequency in engineering, physics, aerospace contexts.
Grammar
How to Use “propulsion” in a Sentence
N of propulsionADJ propulsionpropulsion NVocabulary
Collocations
Usage
Meaning in Context
Business
Rare; used in high-tech industries: 'The company invested heavily in new propulsion technologies.'
Academic
Common in physics, engineering papers: 'The study examines the efficiency of ionic propulsion.'
Everyday
Very rare; might be used in documentaries or discussions about space travel.
Technical
Core term in aerospace, naval, mechanical engineering: 'The propulsion module experienced a transient fault.'
Watch out
Common Mistakes When Using “propulsion”
- Using it as a countable noun (*'a propulsion').
- Confusing with 'propeller' (a specific device, while propulsion is the force/concept).
FAQ
Frequently Asked Questions
It is primarily an uncountable (mass) noun. You do not say 'a propulsion' but rather 'a means of propulsion' or 'a propulsion system'.
'Thrust' is the specific reactive force described by Newton's third law, often measured quantitatively. 'Propulsion' is a broader term for the entire process or technology of creating forward motion, which generates thrust.
Rarely. While its core meaning is 'driving forward', it is overwhelmingly used for mechanical, engineered, or technological systems (rockets, jets, ships). It would sound unusual for biological movement (e.g., a fish's propulsion).
The related verb is 'propel'. 'Propulsion' is the noun form describing the action or result of propelling.
The act or process of driving or pushing something forward.
Propulsion is usually formal / technical in register.
Propulsion: in British English it is pronounced /prəˈpʌl.ʃən/, and in American English it is pronounced /prəˈpʌl.ʃən/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a PROfessional PULSE pushing a rocket: PRO-PULSION.
Conceptual Metaphor
PROPULSION IS A PUSHING FORCE.
Practice
Quiz
Which of the following is the primary meaning of 'propulsion'?