Pollution

noun

1. The desecration of something holy or sacred; defilement, profanation.
2. The ejaculation of semen outside of sexual intercourse, especially a nocturnal emission.
3. Moral or spiritual corruption; impurity, degradation, defilement.
4. Physical contamination, now especially the contamination of the environment by harmful substances, or by disruptive levels of noise, light etc.
5. Something that pollutes; a pollutant.