density

Noun

1. The amount of a certain phenomenon (such as stuff, things, energy, or otherwise) in a given area (surface area) or volume (amount of space).
   • 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...
   • The microcannon was seen moving at about a micron per second, it was about 15 microns long, and the high speed photograph was done in water (density of 1 kg/L, viscosity of about 0.001 pascal seconds). - 2018 February...
   • Aquafaba was recovered from 10 commercial canned chickpea products and correlations among aquafaba composition, density, viscosity and foaming properties were investigated. Proton NMR was used to characterize aquafaba...

   Synonyms: denseness mass density

   Coordinate Terms: viscosity thickness

   1. (physics) A measure of the mass of matter contained by a unit volume.

   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.
      • Density, which is genetically linked, deals with the number of strands per square inch on your scalp. Normal density can range from slight to substantial, varying from person to person. - 2007, Lisa Akbari, Every...
      • It is vital to use proper keyword density because if your density is too low, your SERP's ranking decreases. - 2010, Alyssa Ast, The Fundamentals of SEO for the Average Joe, page 23:

      Synonyms: denseness number density

      Coordinate Terms: viscosity thickness

2. 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

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

   Synonyms: denseness thickheadedness blockheadedness