density

[ den-si-tee ]

noun

, plural den·si·ties.

1. the state or quality of being dense; compactness; closely set or crowded condition.
2. stupidity; slow-wittedness; obtuseness.
3. 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.

4. Physics. mass per unit volume.
5. Electricity.
   1. 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.
   2. current density.
6. the degree of opacity of a substance, medium, etc., that transmits light.
7. Photography. the relative degree of opacity of an area of a negative or transparency, often expressed logarithmically.
8. Computers. a measure of the compactness of data saved on a storage medium, as disk or tape, or displayed on an electronic screen.

density

/ ˈdɛnsɪtɪ /

noun

1. the degree to which something is filled, crowded, or occupied

   high density of building in towns

2. obtuseness; stupidity
3. 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 ρ See also relative density
4. a measure of a physical quantity per unit of length, area, or volume See charge density current density
5. physics photog See transmission density reflection density

density

/ dĕn′sĭ-tē /

1. A measure of the quantity of some physical property (usually mass) per unit length, area, or volume (usually volume).
2. ◆ 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.
3. ◆ 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.
4. See also Boyle's law

density

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

Other Words From

• non·densi·ty noun
• super·densi·ty noun

Word History and Origins

Origin of density¹

First recorded in 1595–1605; from Latin dēnsitās, equivalent to dēns(us) dense + -itās -ity

Example Sentences

"Here, it helped guide us to think about how the cell density, proliferation rate, signaling, and all these different things conspire."

From Science Daily

The paper, "Open-cycle thermochemical energy storage for building space heating: Practical system configurations and effective energy density," appears in the December issue of the journal Applied Energy.

From Science Daily

To get the mass, the team measured the total surface area of the plastic particles and incorporated a standard measure of thickness and density based on the most common microplastic waste types: polyethylene and polypropylene.

From Science Daily

Scans show that has caused her bone density to deteriorate.

From BBC

"As a result of their unique structures, MOFs have a high density of sites where you can capture and release CO2 under the appropriate conditions," Carsch said.

From Science Daily

Related Words

• frequency
• quantity
• thickness