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density

[den-si-tee]

noun, plural -ties.

the state or quality of being dense; compactness; closely set or crowded condition.

stupidity; slow-wittedness; obtuseness.

the number of inhabitants, dwellings, or the like, per unit area: The commissioner noted that the population density of certain city blocks had fallen dramatically.

Physics. mass per unit volume.

Electricity.

the quantity of electricity per unit of volume at a point in space, or the quantity per unit of area at a point on a surface.

current density.

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the degree of opacity of a substance, medium, etc., that transmits light.

Photography. the relative degree of opacity of an area of a negative or transparency, often expressed logarithmically.

Computers. a measure of the compactness of data stored on an external storage medium, as disk or tape, or displayed on a CRT or other screen.

COLLAPSE

Origin:
1595–1605; < Latin dēnsitās, equivalent to dēns(us) dense + -itās -ity

Related forms

non·den·si·ty, noun

su·per·den·si·ty, noun

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Density is always a great word to know.

So is gamma ray. Does it mean:

a photon of penetrating electromagnetic radiation emitted from an atomic nucleus; electromagnetic radiation with wavelengths shorter than 1/10 of a nanometer

nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings

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Example Sentences

The idea of greater density on college campuses almost always meets with opposition.

Various investigators have shown that sound frequencies in this range can improve bone density and promote healing.

The cholesterol in low-density lipoproteins was deemed a “marginal risk .

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Collins

World English Dictionary

density (ˈdɛnsɪtɪ)

—n , pl -ties
1.	the degree to which something is filled, crowded, or occupied: high density of building in towns
2.	obtuseness; stupidity
3.	See also relative density ρ a measure of the compactness of a substance, expressed as its mass per unit volume. It is measured in kilograms per cubic metre or pounds per cubic foot
4.	charge density See current density a measure of a physical quantity per unit of length, area, or volume
5.	physics, photog transmission density See reflection density

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

density

c.1600, from Fr. densité (16c.), from O.Fr. dempsité (13c.), from L. densitas "thickness," from densus "thick, dense."

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

density den·si·ty (děn'sĭ-tē)
n.

The mass per unit volume of a substance at a specified pressure and temperature.
The quantity of something per unit measure, especially per unit length, area, or volume.

American Heritage

Science Dictionary

density

(děn'sĭ-tē) Pronunciation Key
A measure of the quantity of some physical property (usually mass) per unit length, area, or volume (usually volume). ◇ Mass density is a measure of the mass of a substance per unit volume. Most substances (especially gases such as air) increase in density as their pressure is increases or as their temperature decreases. ◇ Energy density is a measure of the amount of energy (often in the form of electromagnetic radiation) per unit volume in a region of space or some material. See also Boyle's law.

American Heritage

Cultural Dictionary

density definition

The relative heaviness of objects, measured in units of mass or weight per units of volume. (See specific gravity.)

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Matching Quote

"The distinction between the two types of art is a difference of density rather than of species. In the same number of bars of Beethoven and Sousa, there is, in Beethoven, more of the essence of music, giving a thicker, more intense effect likely to alienate the unfamiliar listener by "boring" him, just as the palate accustomed to that richer food is bored by the thinness of the popular tune. The feeling that this is not the only difference is due to the fact that as an art grows more and more complex and dense, the number of relations among simple elements increases until those relations look like extraordinarily refined experiences denied to the common herd. Yet there is no real barrier to be leaped over by an effort of genius between understanding a "vulgar" dance tune and a Beethoven symphony."

-Jacques Barzun

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