grinder meaning and definition

GRINDER noun

Definition of grinder (noun)

1. 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
   • synonyms: bomber, Cuban sandwich, hero, hero sandwich, hoagie, hoagy, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep
2. grinding tooth with a broad crown; located behind the premolars
   • synonyms: molar
3. machinery that processes materials by grinding or crushing
   • synonyms: mill, milling machinery
4. a machine tool that polishes metal