1.
Erosion is the gradual destruction and removal of rock or soil in a particular area by rivers, the sea, or the weather.
As their roots are strong and penetrating, they prevent ~.
...~ of the river valleys.
...soil ~.
N-UNCOUNT
2.
The ~ of a person’s authority, rights, or confidence is the gradual destruction or removal of them.
...the ~ of confidence in world financial markets.
...an ~ of presidential power.
N-UNCOUNT: usu N of n
3.
The ~ of support, values, or money is a gradual decrease in its level or standard.
...the ~ of moral standards.
...a dramatic ~ of support for the program.
N-UNCOUNT: usu N of n