- the degree to which something is filled, crowded, or occupied: high density of building in towns
- obtuseness; stupidity
- 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 footSymbol: ρ
See also relative density - a measure of a physical quantity per unit of length, area, or volume
- See transmission density, reflection density
WordReference Random House Learner's Dictionary of American English © 2026
den•si•ty /ˈdɛnsɪti/USA pronunciation
n., pl. -ties.
WordReference Random House Unabridged Dictionary of American English © 2026- the state or quality of being dense:[uncountable]the density of the prose.
- the average number of inhabitants per unit of area:[countable]a population density of 100 persons per square mile.
- Physicsthe relation of mass to volume;
mass per unit volume:[countable]a density of 15 cubic centimeters per gram. - Computing a measure of how much data can be stored in a given amount of space on a disk, tape, or other computer storage medium:[uncountable]a high-density disk.
- [uncountable] great stupidity or dullness.
den•si•ty
(den′si tē),USA pronunciation n., pl. -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.
- Physicsmass 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.
- See current density.
- Opticsthe degree of opacity of a substance, medium, etc., that transmits light.
- Photographythe relative degree of opacity of an area of a negative or transparency, often expressed logarithmically.
- Computinga measure of the compactness of data stored on an external storage medium, as disk or tape, or displayed on a CRT or other screen.
- Latin dēnsitās, equivalent. to dēns(us) dense + -itās -ity
- 1595–1605
Collins Concise English Dictionary © HarperCollins Publishers::
density /ˈdɛnsɪtɪ/ n ( pl -ties)
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'density' also found in these entries (note: many are not synonyms or translations):
actinium
- air
- air pocket
- Airy
- aluminium
- americium
- antimony
- argon
- arsenic
- attenuate
- B
- bad cholesterol
- barium
- berkelium
- beryllium
- bismuth
- body
- boron
- bp
- bromine
- brush discharge
- bush
- cadmium
- caesium
- calcium
- carbon
- Cavendish
- cerium
- chlorine
- chromium
- cobalt
- condense
- contrast
- copper
- cosmic dust
- critical density
- curium
- d
- dense
- densimeter
- DIN
- Dumas
- dysprosium
- electric displacement
- electric flux density
- electromagnetic moment
- erbium
- europium
- exponential distribution
- aerometer
