impurity

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The quality or condition of being impure, especially.
• noun Contamination or pollution.
• noun Lack of consistency or homogeneity; adulteration.
• noun A state of immorality; sin.
• noun Something that renders something else impure; an inferior component or additive.

from The Century Dictionary.

• noun The condition or quality of being impure, in either a physical or a moral sense.
• noun That which is or makes impure, physically or morally: as, impurities in a liquid.
• noun Synonyms Uncleanness, dirtiness, filthiness; immodesty, ribaldry, grossness, vulgarity.

from the GNU version of the Collaborative International Dictionary of English.

• noun The condition or quality of being impure in any sense; defilement; foulness; adulteration.
• noun That which is, or which renders anything, impure; foul matter, action, language, etc.; a foreign ingredient.
• noun (Script.) Lack of ceremonial purity; defilement.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The condition of being impure; because of contamination, pollution, adulteration or insufficient purification.
• noun A component or additive that renders something else impure.
• noun A state of immorality or sin; especially the weakness of the flesh: inchastity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun worthless or dangerous material that should be removed
• noun the condition of being impure