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
This concentration distorts markets, raises costs for families, threatens national security, and removes decisions from Texans’ hands.
—
Eleanor Dearman, Fort Worth Star-Telegram, 14 Feb. 2026
In fact, some of these data centers use the same amount of energy per day as a small city, leading to higher than average utility rate increases in states with the highest concentrations of them.
—Natasha Sutherland, The Orlando Sentinel, 13 Feb. 2026
By the time the researchers tested for them, the concentrations had declined to levels lower than those found in agricultural soils.
—Rachel Becker, Los Angeles Times, 12 Feb. 2026
The Washington study found that communities with higher concentrations of arts and cultural nonprofits have 3% lower levels of income inequality among residents.
—Aria Jones, Dallas Morning News, 11 Feb. 2026
See All Example Sentences for concentration
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Eleanor Dearman, Fort Worth Star-Telegram, 14 Feb. 2026
In fact, some of these data centers use the same amount of energy per day as a small city, leading to higher than average utility rate increases in states with the highest concentrations of them.
—Natasha Sutherland, The Orlando Sentinel, 13 Feb. 2026
By the time the researchers tested for them, the concentrations had declined to levels lower than those found in agricultural soils.
—Rachel Becker, Los Angeles Times, 12 Feb. 2026
The Washington study found that communities with higher concentrations of arts and cultural nonprofits have 3% lower levels of income inequality among residents.
—Aria Jones, Dallas Morning News, 11 Feb. 2026
See All Example Sentences for concentration
Cite this Entry
“Concentration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/concentration. Accessed 19 Feb. 2026.
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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