| Grater (a.) One who, or that which, grates; especially, an instrument or utensil with a rough, indented surface, for rubbing off small particles of any substance; as a grater for nutmegs. Thesaurus Entries cheese grater, comminutor, crusher, granulator, grinder, kominuter, levigator, masher, mill, millstone, mortar and pestle, nutmeg grater, pestle, pulverizer, quern, quernstone, rock crusher, roller, shredder, steamroller, triturator |