What is the meaning of Pollution?

Physical contamination, now especially the contamination of the environment by harmful substances, or by disruptive levels of noise, light etc.

Something that pollutes; a pollutant.

The desecration of something holy or sacred; defilement, profanation.

The ejaculation of semen outside of sexual intercourse, especially a nocturnal emission.

Moral or spiritual corruption; impurity, degradation, defilement.

pollution

Source: wiktionary.org