- The quality of being dense, close, or thick; compactness;
-- opposed to rarity. - 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. - Depth of shade.
Population density Population density is the number of people who live in a given area. This is usually measured by the number of people per square mile (in the US) or kilometre (in Canada).
High-density airspace control zone High-density airspace control zone— airspace designated in an airspace control plan or airspace control order in which there is a concentrated employment ...
Definition
[ n.]