An abrasion is a scrape. An abrasion can happen to a person, as in a skinned knee, or to an object, as in what you get when you apply sandpaper to wood.
The act of abrading, wearing, or rubbing off; the wearing away by friction; 
Noun
 the wearing down of rock particles by friction due to water or wind or ice
Noun
 erosion by friction
Noun
 an abraded area where the skin is torn or worn off
n.
 The act of abrading, wearing, or rubbing off; the wearing
   away by friction; as, the abrasion of coins.
n.
 The substance rubbed off.
n.
 A superficial excoriation, with loss of substance under
   the form of small shreds.
Abrasion
The act of abrading, wearing, or rubbing off; the wearing away by friction; 
Usage Examples
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