A robe is a piece of clothing, usually made of towelling, which people wear in the house, especially when they have just got up or had a bath. Ryle put on a robe and went down to the kitchen
A robe is a loose piece of clothing which covers all of your body and reaches the ground. You can describe someone as wearing a robe or as wearing robes. Pope John Paul II knelt in his white robes before the simple altar
outerwear consisting of a long flowing garment used for official or ceremonial occasions