density Meaning, Definition & Usage

  1. noun the amount per unit size
    denseness.
  2. noun the spatial property of being crowded together
    compactness; concentration; tightness; denseness.

WordNet

Den"si*ty noun
Etymology
L. densitas; cf. F. densité.
Definitions
  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 1913