concentration (EN)

noun

noun “concentration”

1. the ability to give all your attention to something; the act of focusing your mind
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   She needed complete silence to maintain her concentration while studying for the exam.
2. the amount of a substance contained in a mixture or solution
   The scientists measured the concentration of pollutants in the river water.
3. the process of making a substance stronger or more pure by removing other substances
   The factory specializes in the concentration of fruit juices to create thicker syrups.
4. a large number of people or things gathered closely together
   There was a concentration of birds near the lake during migration season.
5. a specific focus of study within a larger academic field
   Her concentration in university was international relations within the political science department.
6. (in games) a memory game in which players try to find matching pairs of cards laid face down
   The children enjoyed playing concentration on rainy days.
7. (in mining) the process of removing unwanted materials from ore to increase the proportion of valuable minerals
   The new technology improved the concentration of silver in the extracted ore.