a piece of wood, metal or plastic, shaped like a tube, that rolls over and over and is used in machines, for example to make sth flat, or to move sth
the heavy steel rollers under the conveyor belt
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 sth flat, crushing or spreading sth.
Flatten the surface of the grass with a roller.
a paint roller
a piece of wood or metal, shaped like a tube, that is used for moving heavy objects
We'll need to move the piano on rollers.
a long, powerful wave in the sea/ocean
Huge Atlantic rollers crashed onto the rocks.
a small plastic tube that hair is rolled around to give it curls
Her hair was in rollers .