• Purity, the absence of
impurity or
contaminants in a substance; for example,
Chemical purity • Purity, the proportion of a named
pure substance in a sample (by weight, mass, volume, or count) •
Fineness, several units of purity of precious metals •
Nine (purity), an informal unit of purity • Purity, the
colorfulness of a light source •
Purity (quantum mechanics), a measure of correlation between a system and its environment •
Purity (algebraic geometry), a lack of unmixed-ness ==See also==