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English definition of “mass”

mass

noun     /mæs/
[U] the amount of matter in any solid object or volume of liquid or gas: These activities help strengthen bones and increase their mass.
a mass of sth [S] a large amount of something: The media company has enjoyed a mass of hype. They were part of the large mass of consumers who acquired a credit card in the 1980s.
(Definition of mass noun from the Cambridge Business English Dictionary © Cambridge University Press)
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