From Longman Dictionary of Contemporary Englishbattering ramˈbattering ˌram noun [countable] PMWa long heavy piece of wood, used in wars in the past to break through walls or doors
Examples from the Corpus
battering ram• We staggered out and began to use it as a battering ram against the locked door.• In fact Pachycephalosaurus had a 10-inch thick skull, and probably used it as a battering ram in ritual contests.• He is a powerhouse, a battering ram, but also has touch and an eye for goal.• I heard the hiss of arrows and the crashing of some makeshift battering ram buckling the beams of the iron-studded gates.• Nizan is always willing to oblige with the battering ram technique, if required. 