Definitions

1. noun

a surface mark or area of skin that has been rubbed or scraped bare

“The abrasion on her knee required several stitches.”

2. noun

a wearing or rubbing away of a surface, especially by friction

“The abrasion of the metal from the rock was a concern for the miners.”

3. verb

to wear away or rub off the surface of something

“The constant friction abraded the surface of the stone.”