concentration
noun
con·cen·tra·tion
ˌkän(t)-sən-ˈtrā-shən 
-ˌsen-
1
a
: 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.
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.
Recent Examples on the Web
In addition, the EPA launched a fire tracker that shows pollutant concentrations measured by these sensors.
—
Andrew Montequin, jsonline.com, 2 Aug. 2025
And now his most recent debacle of no-bid contracts to his donors to build a detention (concentration) camp in the Everglades screams a total lack of transparency.
—Letters To The Editor, The Orlando Sentinel, 2 Aug. 2025
Ozone concentrations will make prolonged outdoor exposure unhealthy for people who are sensitive to pollution, including those with asthma or lung disease, according to the Colorado Department of Public Health and Environment.
—Elise Schmelzer, Denver Post, 1 Aug. 2025
Samples of lead concentration collected by the Gopher Resource monitor showed a three-month rolling average of: 0.19 micrograms per cubic meter in January; 0.21 micrograms in February; and 0.23 micrograms in March, according to the MPCA.
—Mars King, Twin Cities, 30 July 2025
See All Example Sentences for concentration
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Andrew Montequin, jsonline.com, 2 Aug. 2025
And now his most recent debacle of no-bid contracts to his donors to build a detention (concentration) camp in the Everglades screams a total lack of transparency.
—Letters To The Editor, The Orlando Sentinel, 2 Aug. 2025
Ozone concentrations will make prolonged outdoor exposure unhealthy for people who are sensitive to pollution, including those with asthma or lung disease, according to the Colorado Department of Public Health and Environment.
—Elise Schmelzer, Denver Post, 1 Aug. 2025
Samples of lead concentration collected by the Gopher Resource monitor showed a three-month rolling average of: 0.19 micrograms per cubic meter in January; 0.21 micrograms in February; and 0.23 micrograms in March, according to the MPCA.
—Mars King, Twin Cities, 30 July 2025
See All Example Sentences for concentration
Cite this Entry
“Concentration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/concentration. Accessed 5 Aug. 2025.
Copy CitationKids Definition
concentration
noun
con·cen·tra·tion
ˌkän(t)-sən-ˈtrā-shən
-sen-
1
: the act or process of concentrating : the state of being concentrated
especially
: direction of attention on a single object
2
: a concentrated mass
3
: the amount of an ingredient or part in relation to that of others : strength
the concentration of salt in a solution
Medical Definition
concentration
noun
con·cen·tra·tion
ˌkän(t)-sən-ˈtrā-shən, -ˌsen-
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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