cellar

Portion of a building beneath ground level, used for utilitarian and storage purposes. It is often called a basement, especially when constructed as part of a foundation. A cellar used for food storage (e.g., a root cellar) may be beneath a house or located outdoors, partly underground, with the upper part mounded over with earth to maintain fairly constant temperature and humidity; the entire enclosure may be concrete, or the floor may be of dirt and the ceiling of timber.