WordReference Random House Learner's Dictionary of American English © 2019
a•bra•sion /əˈbreɪʒən/USA pronunciation   n. 
  1. Pathology[uncountable] the act or process of abrading.
  2. a scraped spot or area:[countable]They found many abrasions on his leg.
See -rase-.
WordReference Random House Unabridged Dictionary of American English © 2019
a•bra•sion  (ə brāzhən),USA pronunciation n. 
  1. Pathologya scraped spot or area;
    the result of rubbing or abrading:abrasions on his leg caused by falling on the gravel.
  2. the act or process of abrading.
  • Medieval Latin abrāsiōn- (stem of abrāsiō), equivalent. to abrās(us) scraped off (past participle of abrādere; see abrade) + -iōn- -ion
  • 1650–60
    • 1.See corresponding entry in Unabridged sore, scrape, lesion.
    • 2.See corresponding entry in Unabridged rubbing, erosion.

Collins Concise English Dictionary © HarperCollins Publishers::

abrasion /əˈbreɪʒən/ n
  1. the process of scraping or wearing down by friction
  2. a scraped area or spot; graze
  3. the effect of mechanical erosion of rock, esp a river bed, by rock fragments scratching and scraping it; wearing down
Etymology: 17th Century: from Medieval Latin abrāsiōn-, from the past participle of Latin abrādere to abrade

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