concentration Meaning, Definition & Usage

  1. noun the strength of a solution; number of molecules of a substance in a given volume
  2. noun the spatial property of being crowded together
    compactness; tightness; denseness; density.
  3. noun strengthening the concentration (as of a solute in a mixture) by removing diluting material
  4. noun increase in density
  5. noun complete attention; intense mental effort
    immersion; absorption; engrossment.
  6. noun bringing together military forces
  7. noun great and constant diligence and attention
    assiduousness; assiduity.

WordNet

Con`cen*tra"tion noun
Etymology
Cf. F. concentration.
Definitions
  1. The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration.
    Concentration of the lunar beams. Boyle.
    Intense concetration of thought. Sir J. Herschel.
  2. The act or process of reducing the volume of a liquid, as by evaporation.
    The acid acquires a higher degree of concentration. Knight.
  3. (Metal.) The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.

Webster 1913