p. pr. & vb. n. - of Roll
a. - 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.
a. - Moving on wheels or rollers, or as if on wheels or rollers; as, a rolling chair.
a. - Having gradual, rounded undulations of surface; as, a rolling country; rolling land.