(on certain dams) a cylindrical gate that rises and falls by rotating against inclined racks.
noun 1. a game similar to ice hockey played on roller skates.
noun 1. any mill that pulverizes, flattens, or otherwise changes material, as grain, by passing it between rolls.
noun 1. a rink for roller-skating.
or rollerskate [roh-ler-skeyt] /ˈroʊ lərˌskeɪt/ verb (used without object), roller-skated, roller-skating. 1. to glide about by means of roller skates.