A Grit

1. A collection of hard small materials, such as dirt, ground stone, debris from sandblasting or other such grinding, or swarf from metalworking.
   1. Sand or a sand–salt mixture spread on wet and, especially, icy roads and footpaths to improve traction.
2. Inedible particles in food.
3. A measure of the relative coarseness of an abrasive material such as sandpaper, the smaller the number the coarser the abrasive.
4. (geology) A hard, coarse-grained siliceous sandstone; gritstone. Also, a finer sharp-grained sandstone, e.g., grindstone grit.
5. Strength of mind; great courage or fearlessness; fortitude.