erosion
US /ɪˈroʊ.ʒən/
UK /ɪˈroʊ.ʒən/
1.
the process of eroding or being eroded by wind, water, or other natural agents
:
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Soil erosion is a major problem in many agricultural areas.
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Coastal erosion is threatening homes along the shoreline.
2.
the gradual destruction or diminution of something
:
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The erosion of public trust in the government is a serious concern.
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There has been a gradual erosion of traditional values.