'attrition' definitions:

Definition of 'attrition'

From: WordNet
noun
Erosion by friction [syn: abrasion, attrition, corrasion, detrition]
noun
The wearing down of rock particles by friction due to water or wind or ice [syn: grinding, abrasion, attrition, detrition]
noun
Sorrow for sin arising from fear of damnation [syn: attrition, contrition, contriteness]
noun
A wearing down to weaken or destroy; "a war of attrition"
noun
The act of rubbing together; wearing something down by friction

Synonyms of 'attrition'

From: Moby Thesaurus