Sideboard/ˈsaɪdbɔːrd/ Definition 1 of 1Pro Tip 1/3Furniture Piece Refers specifically to furniture used for storing items, typically in a dining context. They admired the ornate carvings on the antique sideboard. Pro Tip 2/3Storage Function Used mainly for keeping dining essentials like dishes and linens. Her grandmother's china collection was displayed on the top of the sideboard. Pro Tip 3/3Room Placement Commonly located in dining rooms but can also be found in living rooms. The sideboard in the living room held a variety of family photos.