corrosion
UK /kəˈɹəʊʒən/ US /kəˈɹoʊʒən/
noun 4
Definitions
noun
1
The act of corroding or the condition so produced.
2
A substance (such as rust) so formed.
3
Erosion by chemical action, especially oxidation.
4
The gradual destruction or undermining of something.
the corrosion of values
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