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[dih-loo-shuh n, dahy-] /dɪˈlu ʃən, daɪ-/
the act of diluting or the state of being diluted.
something diluted.
Origin of dilution
First recorded in 1640-50; dilute + -ion
Related forms
antidilution, adjective
nondilution, noun
overdilution, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for dilution
Historical Examples
  • But Mr. Drayton stopped the dilution by snatching up his tumbler.

    A Son of Hagar

    Sir Hall Caine
  • This staining can only be limited by dilution, but not by the addition of opposed dyes.

    Histology of the Blood Paul Ehrlich
  • dilution, or addition of water, at once discharges the colour.

  • Is there not an infusion of Xenophon in Sophocles, as compared to Æschylus,—a dilution?

    Letters of Edward FitzGerald Edward FitzGerald
  • For the second dilution it would take 10,000 drops, or about a pint.

    Medical Essays Oliver Wendell Holmes, Sr.
  • The twelfth dilution would of course fill a million such lakes.

    Medical Essays Oliver Wendell Holmes, Sr.
  • Instead of being the 30th dilution, it is about the 30th concentration.

    The Red Acorn John McElroy
  • For the second dilution it would take 10;000 drops, or about a pint.

    Medical Essays Oliver Wendell Holmes, Sr.
  • It may now be made up with beer to the proper measure of dilution.

  • Why have you accepted his dilution of nonsense on Verlaine and Huysmans?

    Very Woman

    Remy de Gourmont
British Dictionary definitions for dilution


the act of diluting or state of being diluted
a diluted solution
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
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Word Origin and History for dilution

1640s, noun of action from past participle stem of Latin diluere (see dilute).

Online Etymology Dictionary, © 2010 Douglas Harper
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dilution in Medicine

dilution di·lu·tion (dī-lōō'shən, dĭ-)

  1. The act of reducing the concentration of a mixture or solution.

  2. A diluted solution.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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dilution in Science
The process of making a substance less concentrated by adding a solvent, such as water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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