A store of things that may be required in the future, which can be retrieved rapidly, protected or hidden in some way.

(computing) 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.

Misspelling of cachet.

(transitive) To place in a cache.

(transitive, computing) To store data in a cache.