n. One who or that which grinds.n. One of the double teeth used to grind or triturate the food; a molar; hence, a tooth in general. See molar.n. One who sharpens or polishes cutting instruments: as, a scissors-grinder.n. A grinding-machine; any implement or tool for grinding or polishing: as, an emery grinder.n. The dish-washer or restless flycatcher, Seisura inquieta. See Seisura.n. The night-jar, Caprimulgus europæus, more fully called knife-, razor-, or scissor-grinder, from the noise it makes. Compare spinner, wheel-bird.n. A cylinder covered with emery for sharpening the wire teeth in card-clothing.