to make a place, substance, etc. dirty or harmful by adding dangerous material
synonyms : adulteratefoulpollute
1. About 70 percent of water in India is contaminated.
2. Reddish-brown tailings slurry has contaminated the water.
3. Plastics have contaminated underground aquifers as well as surface waters in many parts of the industrialized world.
4. Harvest contaminated tobacco.