grinder (n.)a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States;
grinder (n.)grinding tooth with a broad crown; located behind the premolars;
grinder (n.)machinery that processes materials by grinding or crushing;
Synonyms: mill /
milling machinery grinder (n.)a machine tool that polishes metal;