impurityim‧pu‧ri‧ty /ɪmˈpjʊərəti $ -ˈpjʊr-/ noun (plural impurities) 
- Lime is added to the liquid metal to remove all the impurities.
- There were impurities in the aluminum.
- Ignorance and its sister, doubt, are the essence of all impurities and the source of every mental and spiritual element.
- Other sources of a suitable soda-rich mineral with the same specific impurity pattern are difficult to suggest.
- The fog, apart from being a mutated organism, now contains carbon dioxide and various other impurities.
- They often contain toxic impurities and may be an irritant to the skin.
- Thus Ahuja's book is the very first in the literature devoted to the evaluation of impurities in drugs.
- With laser techniques, however, the molecular energy levels of the impurities are quite different from the atomic ones.
- Workers add chemicals to remove impurities such as sulphides.
not pure► impure a substance that is impure is not pure and contains other substances: · New laws restrict the sale of impure chemicals.· The last sample was impure and quite useless for manufacturing purposes.
► impurity something in a substance which should not be in it and which makes it not pure: · Lime is added to the liquid metal to remove all the impurities .· There were impurities in the aluminum.
VERB► contain· They often contain toxic impurities and may be an irritant to the skin.· The beans contain an impurity which causes James to become violently ill.· It contains a number of impurities the sum of which are known as water hardness salts.
nounpurificationpuristpurity ≠ impuritypurifieradjectivepure ≠ impureverbpurifyadverbpurely
All natural minerals contain impurities.