Contaminated definition

All the cities along the Mississippi River had been marked as contaminated to some extent.

Both the air and the water in their neighbourhood were contaminated thereby.

Galena (q.v.), the principal lead ore, has a world-wide distribution, and is always contaminated with silver sulphide, the proportion of noble metal varying from about o of or less to o 3%, and in rare cases coming up to 2 or i %.