Definition of “density” - English Dictionary

“density” in British English

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densitynoun [ C or U ]

uk /ˈden.sɪ.ti/ us /ˈden.sə.t̬i/

density noun [ C or U ] (OF MATTER)

specialized physics the relationship between the mass of a substance and its size:

Lead has a high density.
Aluminium is low in density.

(Definition of “density” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“density” in American English

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densitynoun [ C/U ]

us /ˈden·sɪ·t̬i/

density noun [ C/U ] (THICKNESS)

also denseness, /ˈdens·nəs/ the quality of being close together and difficult to go or see through:

[ U ] The density of the smoke made it difficult to breathe.

density noun [ C/U ] (AMOUNT OF MATTER)

physics the relationship between the mass of a substance and its size:

[ C ] Lead has a high density.

(Definition of “density” from the Cambridge Academic Content Dictionary © Cambridge University Press)