A store of things that may be required in the future, which can be retrieved rapidly, protected or hidden in some way.
Example: "Members of the 29-man discovery team laid down food caches to allow the polar team to travel light, hopping from food cache to food cache on their return journey."
A fast temporary storage where recently or frequently used information is stored to avoid having to reload it from a slower storage medium.
(geocaching) a container containing treasure in a global treasure-hunt game.