Read the dictionary definition of grinder. All definitions for this word.
1. a machine tool that polishes metal
2. machinery that processes materials by grinding or crushing
3. grinding tooth with a broad crown; located behind the premolars
4. 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
