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concentration
2 ENTRIES FOUND:
Learner's definition of CONCENTRATION
1
[noncount] : the ability to give your attention or thought to a single object or activity : the ability to concentrate专心；专注
- the power of concentration专注力
- All that noise is disturbing my concentration.所有那些噪声都在分散我的注意力。
- The job required her full concentration.这项工作需要她全神贯注。
- When you're tired it's easy to lose your concentration.人疲倦时容易失去专注力。
2
: the act of giving your attention to a single object or activity注意；关注
[singular]
- There was a concentration on ethics within the agency.这个机构注重内部道德规范。
- His concentration [=focus] was on gathering evidence for the trial.他的精力都用在了为审判收集证据上。
[noncount]
- a student who chose law as his field/area of concentration [=his main area of study]选择法律作为主要研究领域的学生
3
a : a large amount of something in one place（某物的）集中，聚集
[count]
- There is a concentration of wealth in the cities.城市里聚集了大量的财富。
[noncount]
- He objects to the concentration of power in the hands of a few rich men.他反对把权力集中在少数富人手中。
b [count] : a large number of people in one place（人的）聚集，聚居
- Officials are expecting a heavy/high concentration of tourists [=are expecting many tourists] for the festival.官方预计节日期间会有大量游客聚集。
4
[count] : the amount of an ingredient in a mixture浓度；含量
- Contaminants were found in low concentrations. [=amounts]污染物的浓度被证实很低。
- measuring the concentration of salt in a solution检测溶液中盐的浓度
- They detected high concentrations of pollutants in the water.他们检测到水中污染物的含量很高。
concentration
noun
con·cen·tra·tion ˌkän(t)-sən-ˈtrā-shən 
-ˌsen-
Synonyms
Example Sentences
All that noise is disturbing my concentration. The job required her full concentration. When you're tired it's easy to lose your concentration. There was a concentration on ethics within the agency. There is a concentration of wealth in the cities. He objects to the concentration of power in the hands of a few rich men. See More
Recent Examples on the Web In Prince George's County, Maryland, where there's a high concentration of poverty, at least 8 percent of the public school district's teacher slots are vacant, more than twice as many as last year, according to the teachers union. 
Gabe Cohen, CNN, 31 Aug. 2022 Cook County is the largest concentration of American descendants of slaves left in America. Darcel Rockett, Chicago Tribune, 22 Aug. 2022 Noe-Hays said there is no necessary concentration of nutrients for urine to be used as fertilizer. Keely Larson, Ars Technica, 20 Aug. 2022 Up until now, the focus of festivals with regard to climate change has been extremely long-term, with a concentration on reducing energy use and waste and limiting an event’s carbon footprint. Scott Roxborough, The Hollywood Reporter, 29 Aug. 2022 Believed to shelter the largest concentration of petrified wood on the planet, Petrified Forest delivers scenic and scientific wonders in equal measures. Roger Naylor, The Arizona Republic, 22 Aug. 2022 In fact, Na+ is at a much higher concentration outside the membrane than inside. Gabriel A. Silva, Forbes, 18 Aug. 2022 The Dothan Area Chamber of Commerce said the new jobs at the Dothan facility will permit APS to enhance the focus on its medical product line, with a concentration on human and animal health markets. Paul Gattis | Pgattis@al.com, al, 9 Aug. 2022 Among its insights: • Even at the lowest concentration measurable in a lab, SARS-CoV-2 virus established a beachhead in the throats of just over half of the young, healthy subjects within two days. Melissa Healy, Los Angeles Times, 30 June 2022 See More
Gabe Cohen, CNN, 31 Aug. 2022 Cook County is the largest concentration of American descendants of slaves left in America. Darcel Rockett, Chicago Tribune, 22 Aug. 2022 Noe-Hays said there is no necessary concentration of nutrients for urine to be used as fertilizer. Keely Larson, Ars Technica, 20 Aug. 2022 Up until now, the focus of festivals with regard to climate change has been extremely long-term, with a concentration on reducing energy use and waste and limiting an event’s carbon footprint. Scott Roxborough, The Hollywood Reporter, 29 Aug. 2022 Believed to shelter the largest concentration of petrified wood on the planet, Petrified Forest delivers scenic and scientific wonders in equal measures. Roger Naylor, The Arizona Republic, 22 Aug. 2022 In fact, Na+ is at a much higher concentration outside the membrane than inside. Gabriel A. Silva, Forbes, 18 Aug. 2022 The Dothan Area Chamber of Commerce said the new jobs at the Dothan facility will permit APS to enhance the focus on its medical product line, with a concentration on human and animal health markets. Paul Gattis | Pgattis@al.com, al, 9 Aug. 2022 Among its insights: • Even at the lowest concentration measurable in a lab, SARS-CoV-2 virus established a beachhead in the throats of just over half of the young, healthy subjects within two days. Melissa Healy, Los Angeles Times, 30 June 2022 See More Word History
Etymology
First Known Use
1606, in the meaning defined at sense 2
Time Traveler
The first known use of concentration was in 1606 Phrases Containing concentration
noun¹
noun²
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