/im pyoor"i tee/ , n. , pl. impurities for 2.
1. the quality or state of being impure.
2. Often, impurities . something that is or makes impure: After the flood the authorities warned against impurities in the drinking water.
[ 1400-50; late ME impurite impuritas. See IMPURE, -ITY ]
Syn. 1. contamination, pollution, taint.