Black's Law Dictionary (2nd edition)dictionaries

Erosion

The gradual eating away of the soil by the operation of currents or tides. Distinguished from submergence, which is the disappearance of the soil under the water and the formation of a navigable body over it. Mulry v. Norton, 100 N. Y. 433, 3 N. E. 584, 53 Am. Rep. 206

Source: Black’s Law Dictionary 2nd Ed (1910)