[kon-suh n-trey-shuh n]


Origin of concentration

First recorded in 1625–35; concentr(ic) + -ation
Related formshy·per·con·cen·tra·tion, nounnon·con·cen·tra·tion, nouno·ver·con·cen·tra·tion, nounpre·con·cen·tra·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for concentration

Contemporary Examples of concentration

Historical Examples of concentration

  • And how was I to know, then, that the concentration was due to the necessity of invention?

    The Fortune Hunter

    Louis Joseph Vance

  • He has the constitution of a rhinoceros, the digestion of an ostrich, and the concentration of an oyster.

    Little Dorrit

    Charles Dickens

  • Oh, gentlemen, have ye ever seen such a concentration of vice?

    Micah Clarke

    Arthur Conan Doyle

  • “Quite,” said Barter, whose face was now a mask of concentration.

    The Mind Master

    Arthur J. Burks

  • Let us now consider some of the implications of this concentration on rendering service.

    Creating Capital

    Frederick L. Lipman

British Dictionary definitions for concentration



intense mental application; complete attention
the act or process of concentrating
something that is concentrated
the strength of a solution, esp the amount of dissolved substance in a given volume of solvent, usually expressed in moles per cubic metre or cubic decimetre (litre)Symbol: c
the process of increasing the concentration of a solution
  1. the act of bringing together military forces
  2. the application of fire from a number of weapons against a target
economics the degree to which the output or employment in an industry is accounted for by only a few firms
another name (esp US) for Pelmanism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for concentration

1630s, "action of bringing to a center," noun of action from verb concentrate (v.). Meaning "a mass so collected" is from 1670s; "continuous focus of mental activity" is from 1846.

Online Etymology Dictionary, © 2010 Douglas Harper

concentration in Medicine




An increase of the strength of a pharmaceutical preparation by the extraction, precipitation, and drying of its crude active agent.
An increase in the strength of a fluid or gas in a mixture by purification, evaporation, or diffusion.
The amount of a specified substance in a unit amount of another substance.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

concentration in Science



The amount of a particular substance in a given amount of another substance, especially a solution or mixture.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.