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We need to turn this mass of evidence into a coherent argument.
There’s a mass of competing anti-virus programs you can choose from.
The vegetables had turned into a sticky mass at the bottom of the pan.
All that was left of the car was a mass of twisted metal.
a mass of dark cloud
A mass of people followed the procession.
a seething mass of protesters
They go to mass every Sunday.
This is the British English definition of mass. View American English definition of mass.