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.
To save, in the religious sense; to bring to salvation.
The process of being restored or made new for the purpose of becoming saved; the process of being rid of the old poor quality conditions and becoming improved.
The process of being saved, the state of having been saved (from hell).