World English Dictionary
dilute (daɪˈluːt)
1.  to make or become less concentrated, esp by adding water or a thinner
2.  to make or become weaker in force, effect, etc: he diluted his story
3.  chem
 a.  (of a solution, suspension, mixture, etc) having a low concentration or a concentration that has been reduced by admixture
 b.  (of a substance) present in solution, esp a weak solution in water: dilute acetic acid
[C16: from Latin dīluere, from dis- apart + -luere, from lavāre to wash]

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