roll ‧ er /ˈrəʊlə $ ˈroʊlər/ BrE AmE noun [countable]
[ Word Family: verb : ↑ roll , ↑ unroll ; noun : ↑ roll , ↑ roller ; adjective : ↑ rolling ]
1 . a piece of equipment consisting of a tube-shaped piece of wood, metal etc that rolls over and over, used for painting, crushing, making things smoother etc:
a paint roller
a garden roller
⇨ ↑ steamroller 1 (1)
2 . [usually plural] a tube-shaped piece of metal or wood, used for moving heavy things that have no wheels:
The boats are taken down to the sea on rollers.
3 . a small plastic or metal tube used for making hair curl SYN curler
4 . a long powerful wave:
great Atlantic rollers