con·cen·tra·tion | \ˌkän(t)-sən-ˈtrā-shən, -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.

Keep scrolling for more

Synonyms & Antonyms for concentration


absorption, attention, engrossment, enthrallment, immersion



Visit the Thesaurus for More 

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.
See More

Recent Examples on the Web

The results would not pinpoint who used the opioids but identify areas with high concentration of users. Terace Garnier, Fox News, "NC town battles opioid epidemic by using robots to test people’s poop," 12 July 2018 The law allows only industrial hemp of the species Cannabis sativa, with the THC concentration of 0.3 percent or lower, the state agriculture department said in the article. Karen Pilarski, Milwaukee Journal Sentinel, "Former Milwaukee Alderman McGee Jr. opens up pop-up hemp store at Mayfair Mall," 10 July 2018 In Indiana, there are at least 194 farmers markets, and central Indiana leads the nation with the highest concentration of farmers markets per capita. Emily Hopkins, Indianapolis Star, "'It opened the door for us': How Indiana's farmers markets help small farmers," 29 June 2018 The camps will be run by high school coaching staffs with a concentration on building fundamental skills in a positive learning environment., "Digest (June 19): Ravens Foundation selects five for college scholarships," 19 June 2018 Many experts believe that without any consequences for not having insurance, more young and healthy people will decide to forgo it, leaving health plans with a higher concentration of elderly and ill — and more expensive — people. Barbara Feder Ostrov,, "Covered California sees big rate hike from federal tax law, but not from Trump's legal moves," 15 June 2018 Clepper was transported from the scene to Memorial Hermann The Woodlands Hospital where a mandatory blood draw was taken showing a blood alcohol concentration of 0.203. Jennifer Summer, Houston Chronicle, "Man indicted for intoxication manslaughter in fatal Magnolia crash re-arrested in Harris County," 8 June 2018 Jarvis studied fine arts with a studio concentration at Vincennes University. Mitchell Kirk, Post-Tribune, "Logansport man finds passion designing for music industry," 18 May 2018 The work requirements will be imposed first in Northern Kentucky, which includes Jefferson, the county with the highest concentration of black residents in the state. Ed Kilgore, Daily Intelligencer, "3 States Are Pushing Medicaid Reforms That Discriminate Against Black People," 14 May 2018

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.

See More

First Known Use of concentration

1606, in the meaning defined at sense 2

History and Etymology for concentration

see concentrate entry 1

Keep scrolling for more

Learn More about concentration

Share concentration

Statistics for concentration

Last Updated

15 Oct 2018

Look-up Popularity

Time Traveler for concentration

The first known use of concentration was in 1606

See more words from the same year

Keep scrolling for more

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 \

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- \

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

Keep scrolling for more

Comments on concentration

What made you want to look up concentration? Please tell us where you read or heard it (including the quote, if possible).


lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!