1. superlative form of coarse: having the roughest or most uneven texture
2. superlative form of coarse: most lacking in refinement or good manners
3. superlative form of coarse: consisting of the largest particles or having the least fine quality

Examples

• This sandpaper has the coarsest grit available.
• The coarsest fabric felt rough against her skin.
• He used the coarsest salt for the recipe.
• That was the coarsest behavior I’ve ever witnessed.
• The coarsest grind setting produced chunky coffee grounds.
• She chose the coarsest wool for the outdoor blanket.
• His coarsest jokes made everyone uncomfortable.