Look up mass in Wiktionary, the free dictionary.

Mass may refer to:

In science

• Mass, the amount of matter in an object to which its weight is proportional
  • Rest mass, the mass of a particle or other object while at rest in a particular reference frame
  • Invariant mass, mass defined in such a way as to be invariant in all reference frames
• Thermal mass, a mass which absorbs heat
• Mass (mass spectrometry), a chemical analysis technique
• Mass (medicine), a tumor
• Mass wasting, the geomorphic process by which soil and rock move downslope under gravity
• True mass, the mass of a planet, used to differentiate from a lower limit on mass
• Landmass, a continuous area of land or land mass, the measure of an area of land
• Body mass index, a health indicator related to human body weight and height
• MASS syndrome, a form of human gigantism

In religion

• Mass (liturgy), religious service in some Christian churches
• Mass (music), a choral composition that sets liturgical text to music
• Black Mass, a parody of the Christian mass often associated with Satanism.

In entertainment

• Mass (film), a Tollywood film starring Akkineni Nagarjuna
• Mass (theatre), a 1971 musical setting of the Roman Catholic Mass by Leonard Bernstein
• Mass (English band), a post-punk band who recorded for the 4AD label
• The Mass (band), an American jazzcore band
• Mass, an alias of electronic musician Peter Harris (Blu Peter)

Other uses

• College-Ready Math-Science School, The Marc and Eva Stern Math and Science School or just (Stern MASS)
• Mass., an abbreviation for the U.S. state of Massachusetts
• Isaac Mass, a Franklin County, Massachusetts politician
• Maß, a unit of volume in German, pronounced 'mass'
• Muscle mass, a bodybuilding term concerning the configuration of muscles in a person's body

As an adjective meaning many

Mass may be used to modify nouns to apply to many cases or instances:

• Mass production
• Mass murder
• Mass suicide
• Weapons of mass destruction
• Mass burial
• Mass hallucination
• Mass hypnosis
• Mass hysteria
• Mass storage

As a term referring to the general public

Singular and plural forms (masses) may refer to:

• Hoi polloi (or "the masses"), a term that usually refers to common people
• Mass communication
• Mass consumption
• Mass education
• Mass marketing
• Mass media
• Mass psychology
• Mass transit
• The Masses, a Socialist magazine
• The working class or the people

See also

• Matter
• Weight

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