Grinder meaning : One who grinds something, such as the teeth. (anatomical) A molar. A power tool with a spinning abrasive disc, used for grinding, smoothing, and shaping materials, usually metal. 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. A fan or performer of grindcore music. A biohacker who uses cybernetic implants or biochemicals to enhance or change their own body. A student who studies hard; a swot. A person who coaches students for an upcoming examination. (ice hockey slang) A hard-working, physical player with limited offensive ability. A low-ranking attorney with no clients who works very hard. An outdoor space for drills and parades.