roller
roll·er [roller rollers] BrE [ˈrəʊlə(r)] NAmE [ˈroʊlər] noun 
1. 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
2. (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
see also ↑steamroller
3. 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.
4. a long, powerful wave in the sea/ocean
•Huge Atlantic rollers crashed onto the rocks.
5. a small plastic tube that hair is rolled around to give it curls
Syn: ↑curler
•heated rollers
•Her hair was in rollers.
see also ↑high roller
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