con·​cen·​tra·​tion | \ ˌkän(t)-sən-ˈtrā-shən How to pronounce concentration (audio) , -ˌsen- \

Definition of concentration

1a : the act or process of concentrating : the state of being concentrated especially : direction of attention to a single object All that noise is disturbing my concentration.
b : an academic major or area of focus within a major The student chose law as his concentration.
2 : a concentrated mass or thing a concentration of wealth in the merchant class
3 : the amount of a component in a given area or volume The ozone concentration in the lower stratosphere has declined.

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Synonyms & Antonyms for concentration



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Examples of concentration in a Sentence

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.
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Recent Examples on the Web Travelers are looking beyond the bright lights of cities like Boston and New York City and seeking out places with a lower concentration of visitors and easier access to the outdoors. Evie Carrick, Travel + Leisure, "10 of the Best Small Towns on the East Coast," 7 Apr. 2021 The school district instead will allocate seats based on student grades and zip codes, prioritizing areas with the greatest concentration of poverty., "Federal judge to hear Boston exam school admission case Tuesday," 6 Apr. 2021 That extra boost of just a few inches coupled with the concentration of manpower was enough to break the vessel free from the banks of the Suez. Mike Brest, Washington Examiner, "Container ship stuck in Suez Canal freed," 29 Mar. 2021 With the largest concentration of hotels in the area, the nearby town of La Fortuna offers the perfect base for exploring the area. Kathryn Sarkis, USA TODAY, "Thinking about your first post-pandemic family trip? Here's how to plan a Costa Rican adventure," 17 Feb. 2021 In Florida, Donna Goldstein, GIS/IT solutions manager at the Palm Beach County school district, used its GIS software to map out neighborhoods with the highest concentration of families likely to lack stable internet. Brian L. Frank For The Wall Street Journal, WSJ, "Schools Work to Speed Up Internet in Rural Homes for Remote Learning," 15 Dec. 2020 Furthermore, according to the EPA survey, Americans spend nearly 90% of their time indoors, where the concentration of contaminants may be the highest. Jeffrey Harper,, "Which air purifier should I get?," 26 Mar. 2021 The concentration in the plant is 300 times higher than in the water column. Sarah Zhang, The Atlantic, "Humans Accidentally Created a Death Trap for Bald Eagles," 25 Mar. 2021 After East Baltimore’s 21202, the second-highest concentration of COVID-19 cases per capita are in the 21224 ZIP code, which includes Highlandtown. Stephanie García,, "Highlandtown welcomed immigrants for 150 years of Baltimore history. Today, it still does.," 20 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'concentration.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of concentration

1606, in the meaning defined at sense 2

History and Etymology for concentration

see concentrate entry 1

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Time Traveler for concentration

Time Traveler

The first known use of concentration was in 1606

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Statistics for concentration

Last Updated

12 Apr 2021

Cite this Entry

“Concentration.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

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More Definitions for concentration



English Language Learners Definition of concentration

: the ability to give your attention or thought to a single object or activity : the ability to concentrate
: the act of giving your attention to a single object or activity
: a large amount of something in one place


con·​cen·​tra·​tion | \ ˌkän-sən-ˈtrā-shən How to pronounce concentration (audio) \

Kids Definition of concentration

1 : close attention to or thought about a subject There is a concentration on math in the curriculum.
2 : the ability to pay close attention I lost my concentration when an ambulance drove past.
3 : a large amount of something or a large number of people in one place


con·​cen·​tra·​tion | \ ˌkän(t)-sən-ˈtrā-shən, -ˌsen- How to pronounce concentration (audio) \

Medical Definition of concentration

1 : the act or action of concentrating: as
a : a directing of the attention or of the mental faculties toward a single object
b : an increasing of strength (as of a solute or a gas in a mixture) or a purifying by partial or total removal of diluents, solvents, admixed gases, extraneous material, or waste (as by evaporation or diffusion)
2 : a crude active principle of a vegetable especially for pharmaceutical use in the form of a powder or resin
3 : the relative content of a component (as dissolved or dispersed material) of a solution, mixture, or dispersion that may be expressed in percentage by weight or by volume, in parts per million, or in grams per liter

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