mass noun, verb, adjective Meaning in Cambridge American English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "mass" - American English Dictionary

See all translations

massnoun [C]

 us   /mæs/

mass noun [C] (LARGE AMOUNT)

a large amount or number: A mass of earth and granite slid down into the narrow gorge. We had to wade through masses of seaweed.

mass noun [C] (MATTER)

[C] physics the amount of matter in any solid object or in any volume of liquid or gasmass number physics The mass number is the total number of proton s and neutron s in an atom.mass defect physics The mass defect is the difference between the mass of a nucleus (= central part of an atom) and the mass of the separate pieces that make up the nucleus.

mass noun [C] (ART)

art [U] the outside size 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 large numbers: [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 large number of people or things: weapons of mass destruction They hope the new movie will appeal to a mass audience.
(Definition of mass noun, verb, adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of mass?
Add Cambridge dictionaries to your browser to your website

More American English definitions for “mass”

Definitions of “mass” in other dictionaries

Word of the Day
truth

the quality of being true

Word of the Day

July 4th, Bastille Day, and the language of revolution.
July 4th, Bastille Day, and the language of revolution.
by Liz Walter,
July 01, 2015
With America’s Independence Day on the 4th and France’s Bastille Day on the 14th, July certainly has a revolutionary theme, so this blog looks at words and phrases we use to talk about the dramatic and nation-changing events that these days celebrate. In particular, it focuses on one of the most important

Read More 

generation pause noun
generation pause noun
July 06, 2015
informal young adults who are not able to do things previously typical for their age group such as buy a home or start a family because of lack of money Meanwhile, a new study released last week revealed a quarter of Brits believe they’ll never own a property, leading them to be

Read More