storeroom \ˈ ̷ ̷ˌ ̷ ̷\noun 1.: a room for the storing of goods or supplies : lumber room 2.: space for storing in a storehouse or repository 3.: storehouse 2 < the prodigious storeroom of his mind — F.H.Taylor > < his storeroom of anecdotes and illustrations is rich and varied — Ben Bradford > 4.: a room used or designed for the display of merchandise on sale