a body of coherent matter, usually of indefinite shape and often of considerable size: a mass of dough.
Medicine/Medical, Pathology. an abnormal lump in the body, often in the form of a cyst or tumor: The mass they removed was alarmingly large, but the great news is that it was benign.
a collection of incoherent particles, parts, or objects regarded as forming one body: a mass of sand.
aggregate; whole (usually preceded by in the): People, in the mass, mean well.
a considerable assemblage, number, or quantity: a mass of errors; a mass of troops.
bulk, size, expanse, or massiveness: towers of great mass and strength.
Painting. an expanse of color or tone that defines form or shape in general outline rather than in detail.
a shape or three-dimensional volume that has or gives the illusion of having weight, density, and bulk.
the main body, bulk, or greater part of anything: the great mass of American films.
Pharmacology. a preparation of thick, pasty consistency, from which pills are made.
the masses, the ordinary or common people as a whole; the working classes or the lower social classes.
pertaining to, involving, or affecting a large number of people: mass unemployment; mass migrations.
affecting a number of people, but more than two and typically a large number: mass murder;a mass shooting.
participated in or performed by a large number of people, especially together in a group: mass demonstrations; mass suicide.
pertaining to, involving, or characteristic of the mass of the people: the mass mind; a movie designed to appeal to a mass audience.
reaching or designed to reach a large number of people: television, newspapers, and other means of mass communication.
done on a large scale or in large quantities: mass destruction.
to come together in or form a mass or masses: The clouds are massing in the west.
to gather into or dispose in a mass or masses; assemble: The houses are massed in blocks.
- mass·ed·ly [mas-id-lee, mast-lee], /ˈmæs ɪd li, ˈmæst li/, adverb
- un·massed, adjective
- massed , mast
Other definitions for Mass (2 of 3)
Other definitions for Mass. (3 of 3)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use mass in a sentence
The photo shows a large and dense mass of smoke all over the US' West Coast, all the way down from Oregon to Southern California.West Coast wildfire smoke is visible from outer space | María Paula Rubiano A. | September 16, 2020 | Popular-Science
Exceptional continental record of biotic recovery after the Cretaceous-Paleogene mass extinction.
The ambition of the Green Deal will not pan out without mass production.Europe’s leaders want to create a ‘new Bauhaus’ as part of its Green Deal. But what does that even mean? | David Meyer | September 16, 2020 | Fortune
Unlike many creatures, it survived the massive volcanic eruptions in what’s now Siberia that upset the chemistry of Earth’s atmosphere and oceans and probably triggered the Permian mass extinction about 252 million years ago.Ancient Lystrosaurus tusks may show the oldest signs of a hibernation-like state | Susan Milius | September 16, 2020 | Science News
Each of its knobby blooms bursts from the soil as a skirted mass of tiny same-sex nubbins.‘Vampire’ parasite challenges the definition of a plant | Susan Milius | September 16, 2020 | Science News For Students
Their bodies were later found incinerated and buried in mass graves outside of town.Why Mexicans Are Enraged by Obama’s Big Tuesday Meeting | Ruben Navarrette Jr. | January 6, 2015 | THE DAILY BEAST
Beyond the huge American flag that hung over the street, the mile-long mass of cops ended.
“The United States had gone to war declaring it must destroy an active weapons of mass destruction program,” the Times reported.
Google itself has taken a break and put plans for mass production on hold.You Were Wrong About Miley & Bitcoin: 2014’s Failed Predictions | Nina Strochlic | December 31, 2014 | THE DAILY BEAST
A colleague overheard two conservative mass. lawmakers talking about what “the gays” could do.The Real Story Behind the Fight for Marriage Equality | E.J. Graff | December 30, 2014 | THE DAILY BEAST
Charred beams and blackened walls showed stark and gaunt in the glow of a smoldering mass of wreckage.The Red Year | Louis Tracy
But hitherto, before these new ideas began to spread in our community, the mass of men and women definitely settled down.The Salvaging Of Civilisation | H. G. (Herbert George) Wells
The Turks were no longer in mass but extended in several lines, less than a pace between each man.Gallipoli Diary, Volume I | Ian Hamilton
Thus among the huge mass of accumulated commodities the simplest wants would go unsatisfied.The Unsolved Riddle of Social Justice | Stephen Leacock
Edward Winslow died; one of the first settlers of Plymouth colony, mass., and afterwards its governor.The Every Day Book of History and Chronology | Joel Munsell
British Dictionary definitions for mass (1 of 3)
a large coherent body of matter without a definite shape
a collection of the component parts of something
a large amount or number, such as a great body of people
the main part or majority: the mass of the people voted against the government's policy
in the mass in the main; collectively
the size of a body; bulk
physics a physical quantity expressing the amount of matter in a body. It is a measure of a body's resistance to changes in velocity (inertial mass) and also of the force experienced in a gravitational field (gravitational mass): according to the theory of relativity, inertial and gravitational masses are equal: See also inertial mass, gravitational mass
(in painting, drawing, etc) an area of unified colour, shade, or intensity, usually denoting a solid form or plane
pharmacol a pastelike composition of drugs from which pills are made
mining an irregular deposit of ore not occurring in veins
done or occurring on a large scale: mass hysteria; mass radiography
consisting of a mass or large number, esp of people: a mass meeting
to form (people or things) or (of people or things) to join together into a mass: the crowd massed outside the embassy
- massed, adjective
- massedly (ˈmæsɪdlɪ, ˈmæstlɪ), adverb
British Dictionary definitions for Mass (2 of 3)
British Dictionary definitions for Mass. (3 of 3)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for mass
A measure of the amount of matter contained in or constituting a physical body. In classical mechanics, the mass of an object is related to the force required to accelerate it and hence is related to its inertia, and is essential to Newton's laws of motion. Objects that have mass interact with each other through the force of gravity. In Special Relativity, the observed mass of an object is dependent on its velocity with respect to the observer, with higher velocity entailing higher observed mass. Mass is measured in many different units; in most scientific applications, the SI unit of kilogram is used. See Note at weight. See also rest energy General Relativity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for mass (1 of 3)
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.