noun

• One who grinds something, such as the teeth.
• (anatomy) A molar.
• (slang) Any tooth.
• A power tool with a spinning abrasive disc, used for grinding, smoothing, and shaping materials, usually metal.
• (western New England) A sandwich made on a long, cylindrical roll.
• A kitchen gadget for processing coffee, herbs etc. into small or powdered pieces.
• The restless flycatcher (Myiagra inquieta) of Australia, which makes a noise like a scissors grinder.
• (music, slang) A fan or performer of grindcore music.
• (slang) A biohacker who uses cybernetic implants or biochemicals to enhance or change their own body.
• (slang, dated) A student who studies hard; a swot.
• (slang, dated) A person who coaches students for an upcoming examination.
• (ice hockey, slang) A hard-working, physical player with limited offensive ability.
• (lawyer slang) A low-ranking attorney with no clients who works very hard.
• (US, military, slang) An outdoor space for drills and parades.
• (radio, informal) Atmospheric interference producing a roaring background noise.
• A surname.