- an ancient military machine having a heavy wooden beam, sometimes with an iron ram's head at its end, for battering down gates, walls, doors, etc.
- any bar, log, etc. used like this to force entrance
- A very heavy metal bar used by firefighters and law enforcement officers to break down walls and doors.
- A heavy beam used in ancient and medieval warfare to batter down the walls and gates of a place under siege.
(plural battering rams)