[ 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

an·ti·di·lu·tion, adjectivenon·di·lu·tion, nouno·ver·di·lu·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dilution

British Dictionary definitions for dilution


/ (daɪˈluːʃən) /


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

Medicine definitions for dilution


[ dī-lōōshən, dĭ- ]


The act of reducing the concentration of a mixture or solution.
A diluted solution.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for dilution


[ dĭ-lōōshən ]

The process of making a substance less concentrated by adding a solvent, such as water.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.