mass Definition in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Definition of “mass” - English Dictionary

Definition of "mass" - American English Dictionary

See all translations

massnoun [C]

 us   /mæs/

mass noun [C] (LARGE AMOUNT)

a ​largeamount or ​number: A mass of ​earth and ​graniteslid down into the ​narrowgorge. We had to ​wade through masses of ​seaweed.

mass noun [C] (MATTER)

[C] physics the ​amount of ​matter in any ​solidobject or in any ​volume of ​liquid or ​gasmass number physics The mass ​number is the ​totalnumber of proton s and neutron s in an ​atom.mass defect physics The mass ​defect is the ​difference between the mass of a nucleus (= ​centralpart of an ​atom) and the mass of the ​separatepieces that make up the ​nucleus.

mass noun [C] (ART)

art [U] the ​outsidesize or ​shape of an ​object, or how ​big it ​appears to be

massverb [I/T]

 us   /mæs/

mass verb [I/T] (CREATE LARGE AMOUNT)

to come or ​bring together in ​largenumbers: [I] The ​crowd massed around the ​entrance to the ​exhibition.

massadjective [not gradable]

 us   /mæs/

mass adjective [not gradable] (LARGE AMOUNT)

involving or having an ​effect on a ​largenumber of ​people or things: weapons of mass ​destruction They ​hope the new ​movie will ​appeal to a mass ​audience.

Massnoun [C/U]

 us   /mæs/
(esp. in the ​RomanCatholicChurch) a ​religiousceremonybased on Jesus’s last ​meal with his disciples (= the men who ​followed him), or ​music written for the ​parts of this ​ceremony
(Definition of mass from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "mass" - British English Dictionary

See all translations

massadjective [before noun]

uk   us   /mæs/
C1 having an ​effect on or ​involving a ​largenumber of ​people or ​forming a ​largeamount: weapons of mass destruction a mass murderer mass starvation Opposition ​groupsplan to ​stage mass demonstrations all over the ​country.
More examples

massnoun

uk   us   /mæs/

mass noun (LARGE AMOUNT)

B2 [S] a ​largeamount of something that has no ​particularshape or ​arrangement: The ​explosionreduced the ​church to a mass ofrubble. The ​forest is a mass ofcolour in ​autumn.masses [plural] UK informal B2 a lot: [+ to infinitive] I've got masses to do at the ​weekend. There were masses ofpeople in ​town today.the mass of sth most of something: The mass of the ​peoplesupport the ​reforms.
More examples

mass noun (SOLID LUMP)

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

mass noun (ORDINARY PEOPLE)

the masses the ​ordinarypeople who ​form the ​largestgroup in a ​society: He was ​popular with the ​rich but ​failed to ​win the ​support of the masses.

mass noun (PHYSICS)

[C] specialized physics the ​amount of ​matter in any ​solidobject or in any ​volume of ​liquid or ​gas: The ​acceleration of a ​bodyequals the ​forceexerted on it ​divided by ​its mass.mass number the ​totalnumber of protons and neutrons in an ​atommass defect the ​difference between the mass of a nucleus (= ​centralpart of an ​atom) and the mass of the ​separatepieces that make up the nucleus

mass noun (RELIGIOUS CEREMONY )

[C or U] (also Mass) a ​religiousceremony 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

massverb [I]

uk   us   /mæs/
to come together in ​largenumbers: 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)

Definition of "mass" - Business English Dictionary

See all translations

massadjective [before noun]

uk   us   /mæs/
having an ​effect on or involving a large ​number of ​people: There have been two decades of mass ​unemployment. mass audience/appeal A ​smallercompany could ​produce a ​breakthroughproduct with mass ​appeal.mass consumerism/consumption The ​society that we ​live in now is so geared to ​spending and mass ​consumerism. a mass ​protest/​rally/​action
See also

massnoun

uk   us   /mæs/
[U] the ​amount of matter in any ​solidobject or ​volume of ​liquid or ​gas: These ​activitieshelpstrengthen bones and ​increase their mass.
a mass of sth [S] a large ​amount of something: The ​mediacompany has enjoyed a mass of ​hype. They were ​part of the large mass of ​consumers who ​acquired a ​creditcard in the 1980s.
(Definition of mass from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of mass?