Concentration

[kon-suh n-trey-shuh n] /ˌkɒn sənˈtreɪ ʃən/

noun
1.
the act of concentrating; the state of being concentrated.
2.
exclusive attention to one object; close mental application.
3.
something concentrated:
a concentration of stars.
4.
Military.

5.
the focusing of a student’s academic program on advanced study in a specific subject or field.
6.
Chemistry. (in a solution) a measure of the amount of dissolved substance contained per unit of volume.
7.
Also called memory. Cards. a game in which all 52 cards are spread out face down on the table and each player in turn exposes two cards at a time and replaces them face down if they do not constitute a pair, the object being to take the most pairs by remembering the location of the cards previously exposed.
/ˌkɒnsənˈtreɪʃən/
noun
1.
intense mental application; complete attention
2.
the act or process of concentrating
3.
something that is concentrated
4.
the strength of a solution, esp the amount of dissolved substance in a given volume of solvent, usually expressed in moles per cubic metre or cubic decimetre (litre) c
5.
the process of increasing the concentration of a solution
6.
(military)

7.
(economics) the degree to which the output or employment in an industry is accounted for by only a few firms
8.
another name (esp US) for Pelmanism
n.

1630s, “action of bringing to a center,” noun of action from verb concentrate (v.). Meaning “a mass so collected” is from 1670s; “continuous focus of mental activity” is from 1846.

concentration con·cen·tra·tion (kŏn’sən-trā’shən)
n.

concentration
(kŏn’sən-trā’shən)
The amount of a particular substance in a given amount of another substance, especially a solution or mixture.