Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mass”

mass

adjective [before noun] uk   /mæs/ us  
C1 having an effect on or involving a large number of people or forming a large amount: weapons of mass destruction a mass murderer mass starvation Opposition groups plan to stage mass demonstrations all over the country.

mass

noun uk   /mæs/ us  

mass noun (LARGE AMOUNT)

B2 [S] a large amount of something that has no particular shape or arrangement: The explosion reduced the church to a mass of rubble. The forest is a mass of colour in autumn. masses [plural] mainly UK informal B2 a lot: [+ to infinitive] I've got masses to do at the weekend. There were masses of people in town today. the mass of sth most of something: The mass of the people support the government's reforms.

mass noun (SOLID LUMP)

[C] a solid lump with no clear shape: The sauce was now a sticky mass at the bottom of the pan.

mass noun (ORDINARY PEOPLE)

the masses the ordinary people who form the largest group in a society: He was popular with the aristocracy but failed to win the support of the masses.

mass noun (PHYSICS)

[C] specialized physics the amount of matter in any solid object or in any volume of liquid or gas: The acceleration of a body equals the force exerted on it divided by its mass.

mass noun (RELIGIOUS CEREMONY )

[C or U] (also Mass) a religious ceremony in some Christian Churches based on Jesus' last meal with his disciples, or music written for parts of this ceremony: to go to Mass
See also

mass

verb [I] uk   /mæs/ us  
to come together in large numbers: Thousands of troops have massed along the border in preparation for an invasion.
(Definition of mass from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of mass?
Add Cambridge dictionaries to your browser to your website

Definitions of “mass” in other dictionaries

Word of the Day

mutant

an organism that is different from others of its type because of a permanent change in its genes

Word of the Day

What’s that lovely smell?

by Kate Woodford​,
October 29, 2014
As adult humans, we can distinguish about 10,000 different smells. It’s no wonder, then, that we have so many words and expressions to describe them. This week we’re taking a look at those smell words – words that describe good smells and words that describe bad smells. Most smell words are either

Read More 

high-frequency trading noun

October 27, 2014
a type of stock market trading that uses very complex technology to trade extremely quickly, often making tiny profits which nevertheless add up to substantial sums Lewis’s book, Flash Boys, is driving a huge amount of attention toward the topic of high frequency trading, and it has rekindled some of

Read More