Main Entry: den·si·ty

Pronunciation: \ˈden(t)-sə-tē\

Function: noun

Inflected Form(s): plural den·si·ties

Date: 1598

1 : the quality or state of being dense
2 : the quantity per unit volume, unit area, or unit length: as a : the mass of a substance per unit volume b : the distribution of a quantity (as mass, electricity, or energy) per unit usually of space (as length, area, or volume) c : the average number of individuals or units per space unit <a population density of 500 per square mile> <a housing density of 10 houses per acre>
3 a : the degree of opacity of a translucent medium b : the common logarithm of the opacity