Concentration | Mean of concentration in English Dictionary

/ˌkɑːnsənˈtreɪʃən/

• Noun
• the ability to give your attention or thought to a single object or activity
1. the power of concentration
2. All that noise is disturbing my concentration.
3. The job required her full concentration.
4. When you're tired it's easy to lose your concentration.
• the act of giving your attention to a single object or activity
1. There was a concentration on ethics within the agency.
2. His concentration [=focus] was on gathering evidence for the trial.
3. a student who chose law as his field/area of concentration [=his main area of study]
• a large amount of something in one place
1. There is a concentration of wealth in the cities.
2. He objects to the concentration of power in the hands of a few rich men.

• a large number of people in one place
1. Officials are expecting a heavy/high concentration of tourists [=are expecting many tourists] for the festival.
• the amount of an ingredient in a mixture
1. Contaminants were found in low concentrations. [=amounts]
2. measuring the concentration of salt in a solution
3. They detected high concentrations of pollutants in the water.