Roller skating is the traveling on surfaces with roller skates. It is a form of recreational activity as well as a sport, and can also be a form of transportation. Skates generally come in three basic varieties: quad roller skates, inline skates or blades and tri-skates, though some have experimented with a single-wheeled `quintessence skate` or.....
recreational and competitive sport in which the participants use special shoes fitted with small wheels to move about on rinks or paved surfaces. ...
[n] - skating on wheels
noun skating on wheels