definition of
abrasion

[1] #1 abrasion n. [scratch, scrape, excoriation] an abraded area where the skin is torn or worn off. wn

[2] #2 abrasion n. [attrition, corrasion, detrition] erosion by friction. wn

[3] #3 abrasion n. [grinding, attrition, detrition] the wearing down of rock particles by friction due to water or wind or ice. wn