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English definition of “abrasion”

abrasion

noun     /əˈbreɪ.ʒən/ specialized
[U] geology, engineering the process of rubbing away the surface of something: There seems to have been some abrasion of the surface.Scratching and rubbing [C] medical a place where the surface of something, such as skin, has been rubbed away: She had a small abrasion on her knee.Cutting and stabbingRough, irregular and uneven
(Definition of abrasion noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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