[rub.ble] n [ME robyl] (14c) 1 a: broken fragments (as of rock) resulting from the decay or destruction of a building "fortifications knocked into ~ --C. S. Forester" b: a miscellaneous confused mass or group of usu. broken or worthless things "lay in a pile of ~, only this time there was more of it, additional gear having hit the deck --K. M. Dodson"
2: waterworn or rough broken stones or bricks used in coarse masonry or in filling courses of walls
3: rough stone as it comes from the quarry
[2]rubble vt rub.bled ; rub.bling (1926): to reduce to rubble