to make a low, heavy, continued sound; as, the thunder rumbles at a distance.-to murmur; to ripple.-a noisy report; rumor.-a low, heavy, continuous sound like that made by heavy wagons or the reverberation of thunder; a confused noise; as, the rumble of a railroad train.-a seat for servants, behind the body of a carriage.-a rotating cask or box in which small articles are smoothed or polished by friction against each other.-to cause to pass through a rumble, or shaking machine. see rumble, n., 4.