from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A very heavy metal bar used by firefighters and law enforcement officers to break down walls and doors.
- n. A heavy beam used in ancient and medieval warfare to batter down the walls and gates of a place under siege.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A heavy object used for battering down walls and gates before gunpowder was known.
The heads of some battering rams were carved in the shape of a ram, an animal renowned for butting with its head. (Wiktionary)