"attrition" in the noun sense
1. abrasion, attrition, corrasion, detrition
erosion by friction
2. grinding, abrasion, attrition, detrition
the wearing down of rock particles by friction due to water or wind or ice
3. attrition, contrition, contriteness
sorrow for sin arising from fear of damnation
4. attrition
a wearing down to weaken or destroy
"a war of attrition"
5. attrition
the act of rubbing together wearing something down by friction
Source: WordNet® (An amazing lexical database of English)
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