Pronunciation: (kôrs, kōrs),[key] —adj.,coars•er, coars•est. 1. composed of relatively large parts or particles: The beach had rough, coarse sand. 2. lacking in fineness or delicacy of texture, structure, etc.: The stiff, coarse fabric irritated her skin. 3. harsh; grating.
4. lacking delicacy, taste, or refinement; unpolished: He had coarse manners but an absolutely first-rate mind. 5. of inferior or faulty quality; common; base.
6. vulgar; obscene; crude: His coarse language angered us. 7. (of metals) unrefined.
8. (of a metal file) having the maximum commercial grade of coarseness.