flywheel: meaning, definition, pronunciation and examples
C1Technical, business (metaphorical use)
Quick answer
What does “flywheel” mean?
A heavy wheel on a rotating shaft that uses inertia to regulate speed and store rotational energy.
Audio
Pronunciation
Definition
Meaning and Definition
A heavy wheel on a rotating shaft that uses inertia to regulate speed and store rotational energy.
Any person, object, or system that stabilizes a process or organization by providing consistent momentum or energy.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or spelling. Pronunciation differs slightly (see IPA).
Connotations
Identical. The metaphorical use is common in business/management jargon in both varieties.
Frequency
Equally low-frequency in general language, but standard in engineering contexts in both regions.
Grammar
How to Use “flywheel” in a Sentence
[The/An] ADJ flywheel VERB[Subject] acts as a flywheel for OBJECTThe flywheel of NOUNVocabulary
Collocations
Examples
Examples of “flywheel” in a Sentence
adjective
British English
- flywheel technology
- flywheel inertia
American English
- flywheel system
- flywheel battery
Usage
Meaning in Context
Business
Refers to a self-reinforcing business model where growth creates more growth; e.g., 'Our loyal customer base is the flywheel of our revenue.'
Academic
Used in physics and engineering papers to describe energy storage or speed regulation in mechanical systems.
Everyday
Rare. If used, it's in contexts like fixing a car or describing old machinery.
Technical
A precise component in internal combustion engines, steam engines, and energy storage systems (flywheel batteries).
Vocabulary
Synonyms of “flywheel”
Vocabulary
Antonyms of “flywheel”
Watch out
Common Mistakes When Using “flywheel”
- Spelling as two words: 'fly wheel'. It's a closed compound: 'flywheel'.
- Confusing it with a 'flywheel' on a bicycle (which is a freewheel or coaster brake).
FAQ
Frequently Asked Questions
No, it is a low-frequency, specialised term. You will encounter it primarily in mechanical engineering, automotive contexts, and metaphorical business jargon.
No, 'flywheel' is exclusively a noun in standard English. The related verb would be descriptive, e.g., 'to act as a flywheel'.
A gear transmits and changes torque and speed. A flywheel's primary purpose is not to transmit power but to store rotational energy and smooth out speed fluctuations using its inertia.
The 'fly' is an old term from mechanics referring to regulating or controlling motion (as in 'flyball governor'). The 'wheel' describes its shape. So, it's a 'wheel that regulates'.
A heavy wheel on a rotating shaft that uses inertia to regulate speed and store rotational energy.
Flywheel is usually technical, business (metaphorical use) in register.
Flywheel: in British English it is pronounced /ˈflaɪwiːl/, and in American English it is pronounced /ˈflaɪˌ(h)wil/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “The flywheel effect (business): The concept that building momentum makes subsequent progress easier.”
Learning
Memory Aids
Mnemonic
Think of a potter's wheel: it's a heavy disc (wheel) that, once spun (flown), keeps spinning smoothly on its own. A flywheel works the same way in an engine.
Conceptual Metaphor
MOMENTUM IS A FLYWHEEL / STABILITY IS A FLYWHEEL (e.g., 'Her experience was the flywheel that kept the project stable.')
Practice
Quiz
In a modern business context, what is most likely meant by 'the flywheel effect'?