prime mover: meaning, definition, pronunciation and examples
C1/C2Formal; Technical (engineering/philosophy)
Quick answer
What does “prime mover” mean?
The main force, agent, or person responsible for initiating or causing an action, event, or project.
Audio
Pronunciation
Definition
Meaning and Definition
The main force, agent, or person responsible for initiating or causing an action, event, or project.
In physics and engineering, the original source of mechanical power; in philosophy (Aristotelian metaphysics), the initial cause of motion or change in the universe.
Dialectal Variation
British vs American Usage
Differences
No major lexical differences. Slight preference for 'driving force' in more general UK contexts.
Connotations
In both varieties, carries connotations of authority, strategic influence, and original causation.
Frequency
Comparably low frequency in both; slightly more common in technical/academic American English.
Grammar
How to Use “prime mover” in a Sentence
[NP] be the prime mover behind/in [NP][NP] act as (the) prime mover of [NP]identify [NP] as the prime moverVocabulary
Collocations
Usage
Meaning in Context
Business
Refers to the key individual or entity driving a merger, deal, or strategic shift.
Academic
Used in philosophy (Aristotle's Unmoved Mover), physics (energy source), and historical analysis.
Everyday
Rare. Might be used in news analysis to describe a person behind a political movement.
Technical
In engineering, a machine (e.g., diesel engine, turbine) that converts energy into mechanical work.
Watch out
Common Mistakes When Using “prime mover”
- Using it as a simple synonym for 'boss' or 'manager' (it implies origination, not just supervision). Confusing with 'prime minister'.
FAQ
Frequently Asked Questions
No. While often a person, it can also be an organisation, an idea, or a physical machine (in engineering).
'Prime mover' emphasises being the first or original cause. 'Driving force' is more general and can describe sustained energy, not necessarily the initial spark.
Yes, it can be neutral, but often carries a strategic, sometimes manipulative connotation (e.g., 'the prime mover of the conspiracy').
Yes, it's the direct etymological and conceptual source. Aristotle's 'Unmoved Mover' (or Prime Mover) is the first cause of all motion in the universe.
The main force, agent, or person responsible for initiating or causing an action, event, or project.
Prime mover is usually formal; technical (engineering/philosophy) in register.
Prime mover: in British English it is pronounced /ˌpraɪm ˈmuːvə(r)/, and in American English it is pronounced /ˌpraɪm ˈmuːvər/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “The power behind the throne (related concept)”
Learning
Memory Aids
Mnemonic
Think of a chess game: the 'prime mover' is the player who makes the first, decisive move that sets the entire game in motion.
Conceptual Metaphor
CAUSATION IS INITIATING MOTION / AN IDEA IS A MACHINE
Practice
Quiz
In an engineering context, a 'prime mover' is best described as: