densities

Noun

density (countable and uncountable, plural densities)

1. A measure of the mass of matter contained by a unit volume.
   • In the past two years, NASA’s Kepler Space Telescope has located nearly 3,000 exoplanet candidates ranging from sub-Earth-sized minions to gas giants that dwarf our own Jupiter. Their densities range from that of styrofoam to iron.2013 May-June, Kevin Heng, “Why Does Nature Form Exoplanets Easily?”, in American Scientist, volume 101, number 3, page 184

   Synonyms:

   denseness, mass density

2. The ratio of one quantity, representing something of interest, to another quantity representing space, area, or extent in which the thing of interest is distributed.
   • The number of particles per unit volume of a specified volume can be considered to be the particle density for the specified volume.

   Synonyms:

   denseness, number density

3. The probability that an outcome will fall into a given range, per unit of that range; the relative likelihood of possible values of a continuous random variable.

   Synonyms:

   probability density

4. Stupidity.
   • There's only so much density that pedagogy can penetrate.

   Synonyms:

   denseness, thickheadedness, blockheadedness