1a piece of wood, metal or plastic, shaped like a tube, that rolls over and over and is used in machines, for example to make something flat, or to move somethingthe heavy steel rollers under the conveyor belt2(often in compounds) a machine or piece of equipment with a part shaped like a tube so that it rolls backwards and forwards. It may be used for making something flat, crushing or spreading somethingFlatten the surface of the grass with a roller.a paint roller see also steamroller3a piece of wood or metal, shaped like a tube, that is used for moving heavy objectsWe'll need to move the piano on rollers.4a long, powerful wave in the sea/oceanHuge Atlantic rollers crashed onto the rocks.5a small plastic tube that hair is rolled around to give it curls
ˈrəʊlə(r)
ˈroʊlər
