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

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

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

  1. to become diluted.


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


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


  1. chem
    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

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.


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


  1. Thinned or weakened by diluting.
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