(n.) 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.
(4):
(n.) A seat for servants, behind the body of a carriage.
(5):
(n.) A rotating cask or box in which small articles are smoothed or polished by friction against each other.
(6):
(v. t.) To cause to pass through a rumble, or shaking machine. See Rumble, n., 4.
(7):
(v. i.) To make a low, heavy, continued sound; as, the thunder rumbles at a distance.