A battering ram is a large, heavy log or beam used to smash through doors, gates, or walls. In medieval times, armies attacking castles would carry massive wooden logs, sometimes with metal caps shaped like a ram's head on the front, and swing them repeatedly against castle gates until the wood splintered and broke. The heaviest battering rams were suspended from wooden frames on wheels, allowing dozens of soldiers to pull them back and slam them forward with tremendous force.

The name comes from male sheep, called rams, which butt their heads together during fights. Just as rams use their heads as weapons, a battering ram uses its heavy front end to deliver powerful blows. Modern police and firefighters use smaller battering rams, usually made of metal, to break through locked doors during emergencies. These handheld versions work on the same principle: concentrated force applied to one spot until something breaks.

The battering ram is one of humanity's oldest siege weapons, used for thousands of years before gunpowder and explosives made castle walls less effective. You might encounter battering rams in historical novels or fantasy stories where characters must breach a fortress or rescue someone trapped behind a heavy door.