1. the quality of having a rough or uneven texture
2. the quality of being rude, vulgar, or lacking in refinement
3. the quality of being composed of large particles or having low quality

Examples

• The coarseness of the sandpaper made it perfect for removing old paint.
• His coarseness in conversation offended many guests at the dinner party.
• The fabric’s coarseness made it uncomfortable against her skin.
• She was shocked by the coarseness of his language.
• The coarseness of the salt crystals was ideal for the recipe.
• The teacher addressed the student’s coarseness in class discussions.
• The coarseness of the gravel provided good drainage for the garden.