What is the meaning of grinding?

noun

• Material resulting from the process of grinding.
  • usage: "vegetable grindings clogged the drain"
• A harsh and strident sound (as of the grinding of gears. )
• The wearing down of rock particles by friction due to water or wind or ice.
  • synonyms: abrasion, attrition, detrition

verb

• Press or grind with a crushing noise.
  • synonyms: crunch, cranch, craunch, grind
• Make a grating or grinding sound by rubbing together.
  • usage: "grate one's teeth in anger"
  • synonyms: grate, grind
• Work hard.
  • usage: "She was digging away at her math homework"; "Lexicographers drudge all day long"
  • synonyms: labor, labour, toil, fag, travail, grind, drudge, dig, moil
• Dance by rotating the pelvis in an erotically suggestive way, often while in contact with one's partner such that the dancers' legs are interlaced.
  • synonyms: grind
• Reduce to small pieces or particles by pounding or abrading.
  • usage: "grind the spices in a mortar"; "mash the garlic"
  • synonyms: grind, mash, crunch, bray, comminute
• Created by grinding.
  • usage: "grind designs into the glass bowl"
  • synonyms: grind
• Shape or form by grinding.
  • usage: "grind lenses for glasses and cameras"
  • synonyms: grind