Definition of 'attrition'

Noun

1. erosion by friction
      Synonyms: abrasion corrasion detrition
2. the wearing down of rock particles by friction due to water or wind or ice
      Synonyms: grinding abrasion detrition
3. sorrow for sin arising from fear of damnation
      Synonyms: contrition contriteness
4. a wearing down to weaken or destroy; "a war of attrition"
5. the act of rubbing together; wearing something down by friction

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