erosion Meaning, Definition & Usage

  1. noun (geology) the mechanical process of wearing or grinding something down (as by particles washing over it)
    wearing; eating away; eroding; wearing away.
  2. noun condition in which the earth's surface is worn away by the action of water and wind
  3. noun a gradual decline of something
    • after the accounting scandal there was an erosion of confidence in the auditors
  4. noun erosion by chemical action
    corroding; corrosion.

WordNet

E*ro"sion noun
Etymology
L. erosio. See Erode.
Definitions
  1. The act or operation of eroding or eating away.
  2. The state of being eaten away; corrosion; canker.

Webster 1913