critical mass: meaning, definition, pronunciation and examples
C1Formal, Academic, Business, Technical
Quick answer
What does “critical mass” mean?
The minimum amount of something required to start or sustain a process, especially a chain reaction.
Audio
Pronunciation
Definition
Meaning and Definition
The minimum amount of something required to start or sustain a process, especially a chain reaction.
The minimum size, number, or amount needed for something to become effective, viable, or self-sustaining; a point at which significant change occurs.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling remains the same.
Connotations
Identical connotations in both varieties.
Frequency
Slightly more frequent in American business and tech journalism, but common in both.
Grammar
How to Use “critical mass” in a Sentence
[verb] + critical masscritical mass + [preposition] + [noun][adjective] + critical massVocabulary
Collocations
Examples
Examples of “critical mass” in a Sentence
adjective
British English
- The critical-mass theory was debated.
- We are at a critical-mass moment.
American English
- The critical-mass theory was debated.
- We are at a critical-mass moment.
Usage
Meaning in Context
Business
The startup needs to acquire a critical mass of subscribers before it can become profitable.
Academic
The study examines the critical mass of participants required for a social movement to gain traction.
Everyday
Our neighbourhood group finally reached critical mass, and now the council is listening to us.
Technical
In nuclear fission, critical mass is the smallest amount of fissile material needed for a sustained chain reaction.
Vocabulary
Synonyms of “critical mass”
Strong
Neutral
Weak
Vocabulary
Antonyms of “critical mass”
Watch out
Common Mistakes When Using “critical mass”
- Using 'critical mass' to mean simply 'a large number' (e.g., 'A critical mass of people attended the concert' – incorrect if it just means 'many'). It must imply a threshold for change.
- Using it as a verb (e.g., 'We need to critical mass our user base').
FAQ
Frequently Asked Questions
It is typically used as an uncountable noun (e.g., 'reach critical mass'). However, you can refer to 'a critical mass' when specifying the amount needed for a particular situation.
Yes, it is neutral. It describes a threshold, which can lead to positive change (e.g., innovation) or negative outcomes (e.g., system failure).
'Critical mass' focuses on the minimum *amount* or *size* required to *initiate* a process. 'Tipping point' focuses on the *moment* when a *small change* leads to a large, often irreversible, effect. They are closely related but emphasise different phases.
It is very rare. The term is usually treated as a singular concept. You might find it in highly technical writing discussing different scenarios (e.g., 'the critical masses for various isotopes'), but in metaphorical use, the plural is almost never used.
The minimum amount of something required to start or sustain a process, especially a chain reaction.
Critical mass is usually formal, academic, business, technical in register.
Critical mass: in British English it is pronounced /ˌkrɪt.ɪ.kəl ˈmæs/, and in American English it is pronounced /ˌkrɪt̬.ɪ.kəl ˈmæs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Hit critical mass”
- “Reach critical mass”
Learning
Memory Aids
Mnemonic
Think of a snowball rolling down a hill. At first, it's small and slow (sub-critical). Once it collects enough snow (reaches critical mass), it grows rapidly and continues on its own.
Conceptual Metaphor
QUANTITY IS MASS / A PROCESS IS A CHAIN REACTION
Practice
Quiz
In which context is 'critical mass' used in its original, literal sense?