The word ram has several meanings:

1. To strike or crash into something with great force. A battering ram was a medieval weapon that soldiers used to ram through castle gates. Today, a car might ram into a tree during an accident, or an angry bull might ram its horns against a fence. The action is sudden, forceful, and direct.
2. A male sheep, especially one that's full-grown. While female sheep are called ewes and young sheep are called lambs, a ram is the adult male, often with curved horns. Rams use those impressive horns to ram into each other when competing for leadership of the flock.
3. To push or force something into a tight space. You might ram clothes into an overstuffed suitcase, or ram books onto a shelf that's already full. This use suggests forcing something where it doesn't quite want to go, often without much care or gentleness.