noun \ˈmas\

Definition of MASS

capitalized :  the liturgy of the Eucharist especially in accordance with the traditional Latin rite
often capitalized :  a celebration of the Eucharist <Sunday masses held at three different hours>
:  a musical setting for the ordinary of the Mass

Origin of MASS

Middle English, from Old English mæsse, modification of Vulgar Latin *messa, literally, dismissal at the end of a religious service, from Late Latin missa, from Latin, feminine of missus, past participle of mittere to send
First Known Use: before 12th century



Definition of MASS

a :  a quantity or aggregate of matter usually of considerable size
b (1) :  expanse, bulk
(2) :  massive quality or effect (3) :  the main part or body <the great mass of the continent is buried under an ice cap — Walter Sullivan> (4) :  aggregate, whole <men in the mass>
c :  the property of a body that is a measure of its inertia and that is commonly taken as a measure of the amount of material it contains and causes it to have weight in a gravitational field
:  a large quantity, amount, or number <a mass of material>
a :  a large body of persons in a group <a mass of spectators>
b :  the great body of the people as contrasted with the elite —often used in plural <the underprivileged and disadvantaged masses — C. A. Buss>

Origin of MASS

Middle English masse, from Anglo-French, from Latin massa, from Greek maza; akin to Greek massein to knead — more at mingle
First Known Use: 15th century

Other Physics Terms

amplitude, centrifugal, centripetal, convection, gradient, hysteresis, kinetic, lase, quantum



: to form or gather into a large group

Full Definition of MASS

transitive verb
:  to form or collect into a mass
intransitive verb
:  to assemble in a mass <three thousand students had massed in the plaza — A. E. Neville>

Examples of MASS

  1. A large crowd of demonstrators massed outside the courthouse.
  2. Clouds were massing on the horizon.
  3. The generals massed their troops.

First Known Use of MASS

14th century



: involving, affecting, or designed for many people

Full Definition of MASS

a :  of or relating to the mass of the people <mass market>; also :  being one of or at one with the mass :  average <mass man>
b :  participated in by or affecting a large number of individuals <mass destruction>
c :  having a large-scale character <mass plantings of tulips>
:  viewed as a whole :  total <the mass effect of a design>

Examples of MASS

  1. Television is a mass medium.

First Known Use of MASS




Definition of MASS


noun \ˈmas\   (Medical Dictionary)

Medical Definition of MASS

: the property of a body that is a measure of its inertia, that is commonly taken as a measure of the amount of material it contains, that causes it to have weight in a gravitational field, and that along with length and time constitutes one of the fundamental quantities on which all physical measurements are based
: a homogeneous pasty mixture compounded for making pills, lozenges, and plasters <blue mass>


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