concentration

concentration is a   Noun

Definition:

[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] 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.

Synonyms: