[ dih-loot, dahy-; adjective dahy-loot ]
/ dɪˈlut, daɪ-; adjective ˈdaɪ lut /

verb (used with object), di·lut·ed, di·lut·ing.

to make (a liquid) thinner or weaker by the addition of water or the like.
to make fainter, as a color.
to reduce the strength, force, or efficiency of by admixture.

verb (used without object), di·lut·ed, di·lut·ing.

to become diluted.


reduced in strength, as a chemical by admixture; weak: a dilute solution.

Nearby words

  1. dilly-dally,
  2. dillydally,
  3. diltiazem,
  4. diltiazem hydrochloride,
  5. diluent,
  6. dilution,
  7. diluvial,
  8. diluvialism,
  9. diluvium,
  10. dim

Origin of dilute

1545–55; < Latin dīlūtus washed away, dissolved (past participle of dīluere), equivalent to dī- di-2 + -lūtus, combining form of lautus (lav(ere) to wash + -tus past participle suffix)

Related forms
Can be confuseddilate dilute

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diluted

British Dictionary definitions for diluted


/ (daɪˈluːt) /


to make or become less concentrated, esp by adding water or a thinner
to make or become weaker in force, effect, etche diluted his story


  1. (of a solution, suspension, mixture, etc) having a low concentration or a concentration that has been reduced by admixture
  2. (of a substance) present in solution, esp a weak solution in waterdilute acetic acid
Derived Formsdilutee, noundiluter, noun

Word Origin for dilute

C16: from Latin dīluere, from dis- apart + -luere, from lavāre to wash

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 diluted



1550s, from Latin dilutus, past participle of diluere "dissolve, wash away, dilute," from dis- "apart" + -luere, comb. form of lavere "to wash" (see lave). Related: Diluted; diluting. As an adjective from c.1600.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for diluted


[ dī-lōōt, dĭ- ]


To reduce a solution or mixture in concentration, quality, strength, or purity, as by adding water.


Thinned or weakened by diluting.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.