concentration

American  

[kon-suhn-trey-shuhn] / 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.

   1. the assembling of military or naval forces in a particular area in preparation for further operations.

   2. a specified intensity and duration of artillery fire placed on a small area.

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.

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concentration British  

/ ˌkɒnsənˈtreɪʃən /

noun

1. intense mental application; complete attention

2. the act or process of concentrating

3. something that is concentrated

4.  c.  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)

5. the process of increasing the concentration of a solution

6. military

   1. the act of bringing together military forces

   2. the application of fire from a number of weapons against a target

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

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concentration Scientific  

/ kŏn′sən-trā′shən /

1. The amount of a particular substance in a given amount of another substance, especially a solution or mixture.

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Other Word Forms

• hyperconcentration noun
• nonconcentration noun
• overconcentration noun
• preconcentration noun

Etymology

Origin of concentration

First recorded in 1625–35; concentr(ic) + -ation

Example Sentences

The government explains this concentration of wealth as an attempt to put wealth in national, instead of foreign hands.

From BBC • Apr. 3, 2026

The map showed a fairly high concentration of poppies near a stretch of Highway 138.

From Los Angeles Times • Mar. 26, 2026

Because of the high concentration of revenue run-rate among Janus clients, the disapproval of just a few key clients could’ve put the deal in doubt, Janus says.

From The Wall Street Journal • Mar. 25, 2026

However, when the concentration reaches 2%, they visit the feeder about half as often.

From Science Daily • Mar. 25, 2026

Kappe knew Froehling's brother, Otto, a barber in Germany, was in a concentration camp for saying something he shouldn't have while he was cutting a customer's hair.

From Nazi Saboteurs by Samantha Seiple

Related Words

• absorption
• combination
• consolidation