(~s, roller-skating, ~d)
1.
Roller-skates are shoes with four small wheels on the bottom.
A boy of about ten came up on ~s.
N-COUNT: usu pl
2.
If you ~, you move over a flat surface wearing ~s.
On the day of the accident, my son Gary was roller-skating outside our house.
VERB: V
roller-skating
The craze for roller skating spread throughout the U.S.
N-UNCOUNT