What is grain mustard and how is it different from other types of mustard?

Grain mustard is a type of mustard made from whole mustard seeds that are coarsely ground, giving it a grainy texture. It is different from other types of mustard, such as yellow mustard or Dijon mustard, which are made from finely ground mustard seeds. Grain mustard typically has a stronger and more pungent flavor compared to other mustards.