pollution Definition

1. The adverse effect on the natural environment, including human, animal or plant life, of a harmful substance that does not occur naturally, eg industrial and radioactive waste, or the concentration to harmful levels of a naturally occurring substance, eg nitrates. See also air pollution, water pollution.

Thesaurus: contamination, defilement, impurity, desecration, dirtying, fouling, foulness, infection, adulteration, befouling; Antonym: purification, purity.