1 pollution, contamination, defilement, adulteration, dirtiness, uncleanness, foulness:
The impurity of the water in our rivers is a cause for concern.
2 Often, impurities. dirt, contaminant, pollutant, pollution, smut, filth, foreign matter or body:
This filter is guaranteed to remove impurities from the water.
3 unchastity, immorality, sinfulness, wickedness, evil, vileness, corruption, degeneration, depravity, looseness, wantonness, lust, lustfulness, promiscuity, promiscuousness, libidinousness, dissoluteness, licentiousness, obscenity, prurience, dirtiness, filthiness, lubricity, salaciousness, lasciviousness, lewdness, lecherousness:
Children ought not be exposed to the impurity encountered on everyday television.