definition of
grinding

[1] #1 grinding n. material resulting from the process of grinding; "vegetable grindings clogged the drain". wn

[2] #2 grinding n. a harsh and strident sound (as of the grinding of gears). wn

[3] #3 grinding n. [abrasion, attrition, detrition] the wearing down of rock particles by friction due to water or wind or ice. wn