Chestnut/ˈtʃesnʌt/ Definition 1 of 4Pro Tip 1/3Holiday Connection Associated with festive traditions, especially in winter or Christmas. Let's go to the market to get some chestnuts! Pro Tip 2/3Edible Nuts Counter to some nut names, 'chestnut' refers to both the tree and its edible product. Chestnut stuffing is my favorite for Thanksgiving. Pro Tip 3/3Preparation Variety Can be prepared in diverse ways, often roasted, boiled, or as an ingredient. We're adding chestnuts to our vegetable stew.