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.

---

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

---

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.

---

Other Word Forms

Derived Forms

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

Etymology

Origin of concentration

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

Explanation

If you have great powers of concentration, that means you're able to focus all your attention on the matter at hand. Concentration can also refer to something that's clustered together or to the density or strength of a solution. A concentration of people means that there are many of them in one area. Your city may have a concentration of artists living in the warehouses by the river. A high concentration of a substance in a solution means that there's a lot of it relative to the volume: the Great Salt Lake has very few fish because of the high concentration of salt. To say that you have good concentration skills means that you pay attention well.

Example Sentences

The Stroop task is a classic psychological test that has been used for decades to study attention, concentration, and self-control.

From Science Daily • Jun. 10, 2026

“These fish likely hunkered down, were hiding under some rocks or places to try to get away from the main concentration of flow,” he said.

From Los Angeles Times • Jun. 9, 2026

The continued concentration of power in a few US mega-corps also poses important questions about the way business, economics and politics works here on Earth.

From BBC • Jun. 8, 2026

The fund’s concentration has worked out well over the past year, as holdings in varying industries have benefited from the AI hardware build-out.

From MarketWatch • Jun. 4, 2026

With the utmost concentration, Bobby seemed to block out everything and everyone around him.

From "Endgame" by Frank Brady

Related Words

• absorption
• combination
• consolidation