grits means: White hominy, dried corn kernels made of white and yellow hominy; used as a cereal similar to rice pudding. (in Cooking Dictionary)

What else does grits mean?

Hominy grits is a common term for coarsely ground hominy. It’s a South American dish. Grits can be prepared with boiling water, and are served as side dishes or cereals. (in Cooking Dictionary)

Ground hominy is ground meat that has been boiled in water or milk, and then served as a side or breakfast dish. (in Merlin Dictionary)

Corn is a coarsely ground cereal. (in Merlin Dictionary)