a piece of wood, metal or plastic, like a tube in shape, that rolls over and over, used as a tool or as part of a machine, for example to make something flat or to move something滚筒；滚轴
Flatten the surface of the grass with a roller.用碾轧机把草轧平。🔊🔊
a paint roller滚筒式油漆刷
the heavy steel rollers under the conveyor belt传送带下沉重的钢滚筒
We'll need to move the piano on rollers.我们需要用滚子来移动钢琴。🔊🔊
