A deleterious change in the chemical structure, physical properties or appearance of a material from natural or artificial exposure.
The state of being reduced in rank, character, or reputation; baseness; moral, physical, or intellectual degeneracy; disgrace; abasement; debasement.
Diminution or reduction of strength, efficacy, or value; degeneration; deterioration.
The act of reducing in rank, character, or reputation, or of abasing; a lowering from one's standing or rank in office or society
The state or condition of a species or group which exhibits degraded forms; degeneration.
Arrest of development, or degeneration of any organ, or of the body as a whole.
The gradual breakdown of components of a material, as a result of a natural element, i.e.: heat, cold and wind.
A gradual wearing down or wasting, as of rocks and banks, by the action of water, frost etc.
Physical contamination, now especially the contamination of the environment by harmful substances, or by disruptive levels of noise, light etc.
Moral or spiritual corruption; impurity, degradation, defilement.
Something that pollutes; a pollutant.