Definition of Erosion

Noun: erosion i'row-zhun

(geology) the mechanical process of wearing or grinding something down (as by particles washing over it)
- eroding, eating away, wearing, wearing away, degradation
Condition in which the earth's surface is worn away by the action of water and wind
A gradual decline of something
"after the accounting scandal there was an erosion of confidence in the auditors"
Wearing away by chemical action
- corrosion, corroding
(medicine) a shallow ulceration or lesion, usually involving skin or epithelial tissue