1. Looseness or roughness in texture (as of cloth)
   "The coarseness of the tweed jacket gave it a rustic appearance";
   - nubbiness, tweediness
    
2. The quality of being composed of relatively large particles
   "The coarseness of the photograph reduced its clarity";
   - graininess, granularity
    
3. The quality of lacking taste and refinement
   "The coarseness of his jokes offended many at the dinner party";
   - commonness, grossness, vulgarity, vulgarism, raunch
    
4. Language or humour that is down-to-earth
   "the coarseness of their language was inappropriate";
   - saltiness

Type of: expressive style, inelegance, raggedness, roughness, style