Erosion E*ro"sion, n. [L. erosio. See {Erode}.] 1. The act or operation of eroding or eating away. [1913 Webster]

2. The state of being eaten away; corrosion; canker. [1913 Webster]

3. The wearing away of the earth's surface by any natural process. The chief agent of erosion is running water; minor agents are glaciers, the wind, and waves breaking against the coast. [Webster 1913 Suppl.]

4. a gradual reduction or lessening as if by an erosive force; as, erosion of political support due to scandal; erosion of buying power by inflation. [fig.] [PJC]

The Collaborative International Dictionary of English. 2000.