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 The cruise ship has the largest concentration of cases – about 23% – of the respiratory virus outside mainland China. USA Today, "Visual guide of the cruise ship quarantined by the coronavirus," 11 Feb. 2020 Increase the number of mammograms performed in zip codes 75216 and 75217, which includes Pleasant Grove, where there was a concentration of late-term diagnoses. Nic Garcia, Dallas News, "Dallas health officials identified five zip codes as the most unhealthy. Here’s how they plan to fix it.," 30 Jan. 2020 The first fire crews to arrive reported back to dispatchers that there were strong concentrations of natural gas in the building and that the building was being evacuated. Mike Johnson, Milwaukee Journal Sentinel, "Richfield Middle School evacuated due to gas leak," 24 Jan. 2020 Initial findings show that simple physical details about the child’s interaction with material are highly correlated with an observer’s judgment about overall concentration levels. Jenny Anderson, Quartz, "The Montessori schools embracing kid-tracking devices," 3 Jan. 2020 While one option is experimenting with concentration levels and frequency of usage, there's also a far easier workaround. Erika Stalder, Glamour, "9 Ingredients to Avoid If You Have Sensitive Skin," 24 Dec. 2019 The result is a growing concentration of high-paying jobs that accelerates wage growth and, by extension, socioeconomic disparities. Taylor Telford,, "Chicago lost ground as top tech jobs concentrated in just 5 metro areas, study says," 9 Dec. 2019 The result is a growing concentration of high-paying jobs that accelerates wage growth and, by extension, socioeconomic disparities., "The explosion of top-tier tech jobs has clustered in a handful of coastal hubs, expanding the wealth and innovation differential that’s draining talent from the rest of the nation, new research shows.," 9 Dec. 2019 But, there could also be a secondary concentration of heavier snowfall totals just east of Denver, perhaps including the area around and just east of Denver International Airport. Chris Bianchi, The Denver Post, "It’s already Denver’s snowiest October in 22 years — and more snow is already piling up," 29 Oct. 2019

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

19 Feb 2020

Cite this Entry

“Concentration.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2020.

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How to pronounce concentration (audio)

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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