What does "rumble" mean?

Additional senses

1. 2.A noisy report; rumor. [Obs.] Delighting ever in rumble that is new. Chaucer.
2. 3.A low, heavy, continuous sound like that made by heavy wagons or the reverberation of thunder; a confused noise; as, the rumble of a railboard train. Clamor and rumble, and ringing and clatter. tennyson. Merged in the rumble of awakening day. H. James.
3. 4.A seat for servants, behind the body of a carriage. Kit, well wrapped, . . . was in the rumble behind. Dickens.
4. 5.A rotating cask or box in which small articles are smoothed or poliched by friction against each other. rumble seat, a seat in the rear of an automobile, outside the passenger cabin, which folds out from the body
5. 6.To cause to pass through a rumble, or shaking machine. See Rumble, n., 4.