1. The number or amount of something per item, unit distance, area, or volume, etc.
   "The city has a high population density"; "a low density gas"
    
2. The spatial property of being crowded together
   "The density of the forest made it difficult to navigate";
   - concentration, denseness, tightness, compactness
    
3. (physics) mass per unit volume, typically expressed in kg/m³
   "The density of water is approximately 1000 kg/m³ at room temperature"

Derived forms: densities

Type of: compactness, spacing, spatial arrangement

Antonym: dispersion

Encyclopedia: Density