movable property: the goods, livestock, and belongings a person or group owns and can carry
This word names the portable wealth a household or a nation owns: flocks and herds, silver and gold, tents and gear, the whole store of goods that can be gathered up and moved. It is deliberately different from land. When Abraham and Lot had grown too rich to live side by side, it was this kind of movable property, above all their animals, that crowded them apart.
Because such goods can be carried, they can also be carried off. A large share of the word's appearances describe property changing hands by force: the goods of Sodom hauled away by raiding kings and then recovered, or the treasure stripped from a defeated king's house. The word itself does not mean plunder. It simply names the goods, and the surrounding story tells us they were seized.
The same term covers the holdings of a king managed by his officials and the possessions the returning exiles brought back from Babylon. In every case it points to concrete, countable wealth rather than abstract riches or social standing.