means A group of animals, people, or things bound together into one moving, hunting, or carried unit — whether a wolf pack, a pack of cards, or a pack on your back.

from From Middle English and Middle Dutch 'pak,' meaning a bundle or load, the word arrived through medieval trade — packs of wool, packs of goods strapped tight for travel. From the idea of things gathered and bound came the sense of a band of animals that move as one, and later any close-knit group. The verb 'to pack' (to bundle up) and the noun share the same Low German trading roots.