Meaning

• 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.

• 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.