Definition of "abrasion" in 英语

noun

1. The act of abrading, wearing, or rubbing off; the wearing away by friction.

   • The metal surface showed signs of abrasion after years of use.

2. An act of abrasiveness.

3. (obsolete) The substance thus rubbed off; debris.

4. (geology) The effect of mechanical erosion of rock, especially a river bed, by rock fragments scratching and scraping it.

5. An abraded, scraped, or worn area.

6. (medicine) A superficial wound caused by scraping; an area of skin where the cells on the surface have been scraped or worn away.

   • The doctor cleaned the small skin abrasion on her knee.

7. (dentistry) The wearing away of the surface of the tooth by chewing.