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critical mass

1 ENTRIES FOUND:
critical mass noun
plural critical masses
critical mass
noun
plural critical masses
Learner's definition of CRITICAL MASS
[count, noncount]
1 
technical : an amount of material (such as plutonium) that is large enough to allow a nuclear reaction to occur（核链式反应的）临界质量
2 
: the size, number, or amount of something that is needed to cause a particular result（达到预期效果所需要的）大小，数目，数量

critical mass

noun

: a size, number, or amount large enough to produce a particular result
the critical mass of activity needed for a retail store

Example Sentences

Recent Examples on the Web The genre was once the most durable and profitable in network TV, but audience levels declined rapidly once DVR usage reached critical mass among consumers, enabling them to watch their favorite shows any time of day. Stephen Battaglio Los Angeles Times (tns), al, 4 Aug. 2022 When a critical mass is reached, the model breaks and a new one is adopted that can better explain things. Ian Beacock, The New Republic, 25 Aug. 2022 Conservatives Only, Righter and Donald Daters have debuted but haven't reached critical mass. Mike Snider, USA TODAY, 12 Aug. 2022 The genre was once the most durable and profitable in network TV, but audience levels declined rapidly once DVR usage reached critical mass among consumers, enabling them to watch their favorite shows any time of day. Stephen Battaglio Los Angeles Times (tns), al, 4 Aug. 2022 The genre was once the most durable and profitable in network TV, but audience levels declined rapidly once DVR usage reached critical mass among consumers, enabling them to watch their favorite shows any time of day. Stephen Battagliostaff Writer, Los Angeles Times, 3 Aug. 2022 While the climate change bells have been tolling for quite some time now, this existential issue seems to be reaching a critical mass in our collective consciousness. Forbes, 8 Aug. 2022 If the thesis is that a critical mass of white voters inevitably tend to push back against necessary change, is real change possible? Benjy Sarlin, NBC News, 5 Aug. 2022 It was designed to be optional but with mechanisms that encourage nations to join once a critical mass of countries have implemented the tax. Richard Rubin, WSJ, 16 July 2022 See More

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of critical mass was in 1947

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