1. a room or space below a cellar or basement

Examples

• The old mansion had a subcellar that was used for wine storage.
• They discovered the subcellar while renovating the basement.
• The subcellar provided additional storage space below ground level.
• Water had leaked into the subcellar during the heavy rains.
• The building’s subcellar housed the main electrical systems.
• Access to the subcellar was through a narrow staircase.