Real Dictionary

rolling pin
a heavy, smooth cylinder of wood, glass, etc., usually with a handle at each end, used to roll out dough
countable noun: A rolling pin is a cylinder that you roll backwards and forwards over uncooked pastry in order to make the pastry flat.
noun: a cylinder of wood or other material, usually with a short handle at each end, for rolling out dough
noun: a cylinder with handles at both ends, often of wood, used for rolling dough, pastry, etc, out flat