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单词 critical mass
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critical mass

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critical mass

1. singular noun
In physics, the critical mass of a substance is the minimum amount of it that is needed for a nuclear chain reaction.
[technical]
2. singular noun
A critical mass of something is an amount of it that makes it possible for something to happen or continue.
Only in this way can the critical mass of participation be reached. [+ of]

critical mass in British English

noun
1. 
the minimum mass of fissionable material that can sustain a nuclear chain reaction
2. 
the minimum amount of money or number of people required to start or sustain an operation, business, process, etc
the critical mass for a subscription digital sports channel

critical mass in American English

1. 
the minimum amount of fissile material that can sustain a nuclear chain reaction under a given set of conditions
2. 
the minimum amount or number required for something to happen, begin, etc.

Examples of 'critical mass' in a sentence
critical mass

He knows when people hit critical mass.
Times, Sunday Times (2006)
Now a critical mass of people in the cancer field accept their existence and are studying them in many different ways.
Times, Sunday Times (2008)
They're all things that build critical mass and bring people to your website.
Times, Sunday Times (2009)
Without a critical mass of people who care about their nation, who feel a sense of pride, the logic of nationalism is finished.
Times, Sunday Times (2013)
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更新时间：2025/1/10 4:53:01