erosion

The Grand Canyon is a monumental example of erosion—the entire canyon was carved by the flow of the Colorado River, which slowly dug the canyon out of stone over the course of eons.

Erosion is the wearing away of sand, soil, or rock by water or wind. But it also has a metaphorical sense. The erosion of standards for behavior in society means that our grandparents would be shocked by what passes for good manners today.

Definitions of erosion
1

n (geology) the mechanical process of wearing or grinding something down (as by particles washing over it)

Synonyms:
eating away, eroding, wearing, wearing away
Types:
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chatter mark
marks on a glaciated rock caused by the movement of a glacier
ablation
the erosive process that reduces the size of glaciers
abrasion, attrition, corrasion, detrition
erosion by friction
beach erosion
the erosion of beaches
deflation
(geology) the erosion of soil as a consequence of sand and dust and loose rocks being removed by the wind
planation
the process of erosion whereby a level surface is produced
soil erosion
the washing away of soil by the flow of water
wash, washout
the erosive process of washing away soil or gravel by water (as from a roadway)
Type of:
geologic process, geological process
(geology) a natural process whereby geological features are modified

n condition in which the earth's surface is worn away by the action of water and wind

Type of:
environmental condition
the state of the environment

n a gradual decline of something

“after the accounting scandal there was an erosion of confidence in the auditors”
Type of:
decline, diminution
change toward something smaller or lower

n erosion by chemical action

Synonyms:
corroding, corrosion
Types:
indentation, pitting, roughness
the formation of small pits in a surface as a consequence of corrosion
rust, rusting
the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
Type of:
chemical action, chemical change, chemical process
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

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