Definitions of coarse:

• adjective:   lacking refinement or cultivation or taste

  Example: "He had coarse manners but a first-rate mind"

• adjective:   of texture; large-grained or rough to the touch

  Example: "Coarse meal"

• adjective:   of low or inferior quality or value

  Example: "Of what coarse metal ye are molded- Shakespeare"

• adjective:   conspicuously and tastelessly indecent

  Example: "Coarse language"