1. (noun)grinding material resulting from the process of grinding Synonyms: attrition, abrasion, detrition
2. (noun)grinding a harsh and strident sound (as of the grinding of gears) Synonyms: attrition, abrasion, detrition
3. (noun)grinding, abrasion, attrition, detrition the wearing down of rock particles by friction due to water or wind or ice Synonyms: excoriation, corrasion, contriteness, rubbing, detrition, contrition, scratch, attrition, friction, abrasion, scrape, grinding