From Longman Dictionary of Contemporary Englishrolling pinˈrolling pin noun [countable] 
DFUa long tube-shaped piece of wood used for making pastry flat and thin before you cook it
DFUa long tube-shaped piece of wood used for making pastry flat and thin before you cook itExamples from the Corpus
rolling pin• Holding a rolling pin and determined to have the last laugh.• Some woman who bats him over the head with a rolling pin.• Roll out the bread lightly with a rolling pin after cutting off the crusts and spread thickly with the cheese filling.• It hung glittering like early morning cobwebs on her rolling pin.• The owner picked up a metal rolling pin, whereupon the man took off his metal studded belt.• Drape half of the dough over the rolling pin, then transfer to the pie pan.• Roll out dough using rolling pin and then fingers to spread it on to the prepared pan.• Then you take out your rolling pin and flatten it. 