pollution

n. contamination; desecration; dirtying, soiling; spoiling, destruction

Pollution is the introduction of pollutants (whether chemical substances, or energy such as noise, heat, or light) into the environment to such a point that its effects become harmful to human health, other living organisms, or the environment.
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Noun
1. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
(hypernym) environmental condition
(hyponym) biodegradable pollution
(derivation) pollute, foul, contaminate
2. the state of being polluted
(synonym) befoulment, defilement
(hypernym) dirtiness, uncleanness
(derivation) pollute, foul, contaminate
3. the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors
(synonym) contamination
(hypernym) soiling, soilure, dirtying
(hyponym) dust contamination
(derivation) pollute, foul, contaminate

n. pollution, contamination, dirtiness

(n.)
The emission of semen, or sperm, at other times than in sexual intercourse.
  

(n.)
The act of polluting, or the state of being polluted (in any sense of the verb); defilement; uncleanness; impurity.