Yes, you can refrigerate the uncooked loaf/loaves, covered, 1 day before you plan to bake them. Allow a few extra minutes in the oven if baking from cold. For already baked meatloaf/loaves, cool completely, wrap well, and refrigerate for up to 3 days or freeze for up to 3 months. If frozen, defrost overnight in the refrigerator and then reheat, covered, on a baking sheet in a 300°F (150°C) oven until hot throughout.