Definition of roller noun from the Oxford Advanced American Dictionary

     

    roller

     noun
    noun
    NAmE//ˈroʊlər//
     
     
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  1. 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 something the heavy steel rollers under the conveyor belt
  2. 2(often in compounds) a machine or piece of equipment with a part shaped like a tube so that it rolls backward and forward. It may be used for making something flat, crushing something or spreading something Flatten the surface of the grass with a roller. a paint roller see also steamroller
  3. 3a 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. 4a long powerful wave in the ocean Huge Atlantic rollers crashed onto the rocks.
  5. 5a small plastic tube that hair is rolled around to give it curls synonym curler heated rollers Her hair was in rollers. see also high roller
See the Oxford Advanced Learner's Dictionary entry: roller