The word pack has several meanings:

1. A group of animals that live and hunt together. Wolves travel in packs, working as a team to find food and protect their territory. A pack usually has a leader and follows organized patterns of behavior. When you hear about a pack of dogs roaming the neighborhood, it means they're moving together as a group.
2. A collection of similar things bundled together. A pack of gum contains several pieces wrapped as one unit. Playing cards come in a pack (also called a deck). When you buy a six-pack of juice boxes, you're getting six containers joined together.
3. To put things into a container for storage or travel. Before a camping trip, you pack your tent, sleeping bag, and supplies into a backpack. When your family moves to a new house, you pack boxes with your belongings. Good packing means organizing efficiently so everything fits and stays protected.
4. A backpack or bag carried on your shoulders. Hikers carry packs filled with water, food, and gear for long treks. A heavy pack can slow you down, while a well-organized pack makes the journey easier.

The word often suggests things working together or being organized into a single unit, whether that's animals cooperating, items bundled for convenience, or belongings prepared for a journey.