Erosion \E*ro"sion\, n. 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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Erosion \E*ro"sion\, n. [L. erosio. See Erode.]

1. The act or operation of eroding or eating away.

2. The state of being eaten away; corrosion; canker.

Source: Webster's Revised Unabridged Dictionary (1913)