rollin'

a. 1. Rotating on an axis, or moving along a surface by rotation; turning over and over as if on an axis or a pivot; as, a rolling wheel or ball. [ 1913 Webster ]

2. Moving on wheels or rollers, or as if on wheels or rollers; as, a rolling chair. [ 1913 Webster ]

3. Having gradual, rounded undulations of surface; as, a rolling country; rolling land. [ U.S. ] [ 1913 Webster ]

Rolling bridge. See the Note under Drawbridge. --
Rolling circle of a paddle wheel, the circle described by the point whose velocity equals the velocity of the ship. J. Bourne. --
Rolling fire (Mil.), a discharge of firearms by soldiers in line, in quick succession, and in the order in which they stand. --
Rolling friction, that resistance to motion experienced by one body rolling upon another which arises from the roughness or other quality of the surfaces in contact. --
Rolling mill, a mill furnished with heavy rolls, between which heated metal is passed, to form it into sheets, rails, etc. --
Rolling press. (a) A machine for calendering cloth by pressure between revolving rollers. (b) A printing press with a roller, used in copperplate printing. --
Rolling stock, or
Rolling plant, the locomotives and vehicles of a railway. --
Rolling tackle (Naut.), tackle used to steady the yards when the ship rolls heavily. R. H. Dana, Jr. [ 1913 Webster ]