erosion

noun

1. 1

   The result of having been worn away or eroded, as by a glacier on rock or the sea on a cliff face.

2. 2

   The changing of a surface by mechanical action, friction, thermal expansion contraction, or impact.

3. 3

   The gradual loss of something as a result of an ongoing process.

   “the erosion of a person's trust”

4. 4

   Destruction by abrasive action of fluids.

5. 5

   (image processing) One of two fundamental operations in morphological image processing from which all other morphological operations are derived.

6. 6

   Loss of tooth enamel due to non-bacteriogenic chemical processes.

7. 7

   A shallow ulceration or lesion, usually involving skin or epithelial tissue.

8. 8

   In morphology, a basic operation (denoted ⊖); see Erosion (morphology).