Definition: foil dinner - A meal that is wrapped in foil and cooked or reheated on a grill or next to a campfire. Almost anything you cook at home can be reheated in foil at the campground. Foil-wrap recipes are easy, require few cooking utensils, and leave little to cleanup. They can easily be adjusted to feed one person or a crowd. All you need is some foil and a charcoal grill or campfire.