noun

1. a person or thing that rolls (in various senses)
2. any of various rolling cylinders or wheels; specif.,
   1. a cylinder of metal, wood, etc. over which something is rolled for easier movement
   2. a cylinder on which something is rolled up or wound the roller of a shade, a hair roller
   3. a heavy cylinder of metal, stone, etc. used to crush or smooth something
   4. a cylinder covered with a napped fabric, fixed on a tool with a handle and used for applying paint
   5. Printing a cylinder, usually of hard rubber, for spreading ink on the form just before the paper is impressed
3. a long bandage in a roll
4. a heavy, swelling wave that breaks on the shoreline
5. any of various birds that roll (in various senses); specif.,
   1. any of a family (Coraciidae) of Old World, tropical coraciiform birds that roll and tumble in flight, as the Eurasian roller (Coracias garrulus)
   2. a canary that rolls, or trills, its notes

adjective