The mass of a particulate material (including voids) in a unit volume

(ecology) Regulation of population growth by mechanisms controlled by the size of the population; especially the curtailment of growth by crowding, predators and competition

(geography) The population density measured as the number of farmers per unit area of arable land

(geography) The population density measured as the number of people per unit area of arable land

(geography, statistics) The population density measured as the number of people per unit area of land

plural of density function

(probability theory) Clipping of probability density function.

(astrophysics) The minimum density a black hole can have: 1/(2G/c² ) or 6.734×10²⁶ kg/m (kilograms per meter).

plural of density dependence

mass per unit length