Definify.com
Webster 1913 Edition
Density
Den′si-ty
(dĕn′sĭ-ty̆)
, Noun.
[L.
densitas
; cf. F. densité
.] 1.
The quality of being dense, close, or thick; compactness; – opposed to
rarity
. 2.
(Physics)
The ratio of mass, or quantity of matter, to bulk or volume, esp. as compared with the mass and volume of a portion of some substance used as a standard.
☞ For gases the standard substance is hydrogen, at a temperature of 0° Centigrade and a pressure of 760 millimeters. For liquids and solids the standard is water at a temperature of 4° Centigrade. The density of solids and liquids is usually called specific gravity, and the same is true of gases when referred to air as a standard.
3.
(Photog.)
Depth of shade.
Abney.
Webster 1828 Edition
Density
DENSITY
,Noun.
1.
Closeness of constituent parts; compactness. Density is opposed to rarity; and in philosophy, the density of a body indicates the quantity of matter contained in it, under a given bulk. If a body of equal bulk with another is of double the density, it contains double the quantity of matter.2.
Thickness; as the density of fog.