Cŏn'çen-trā'tion, n.

n. [Fr. concentration.] 1. The act of concentrating; the act of bringing nearer together; compression into a narrow space. “Concentration of the lunar beams.” Boyle. Gloom and silence produce composure of mind and concentration of ideas. Johnson. 2. (Chem.) The volatilization of part of a liquid, in order to increase the strength of the remainder.