1. A rarified quality
   "the low density of the upper atmosphere";
   - rarity, tenuity

1. Having low relative density or specific gravity
   "The low-density foam easily floated on water"; "They used low-density materials to reduce the weight of the aircraft"
    
2. Having low concentration
   "low-density urban areas"

Derived forms: low densities

See also: distributed, light

Type of: density