Meaning

noun a hidden storage space (for money or provisions or weapons)

noun a secret store of valuables or money

noun (computer science) RAM memory that is set aside as a specialized buffer storage that is continually updated; used to optimize data transfers between system elements with different characteristics

originFrom French cache (as used by French Canadian trappers to mean “hiding place for stores”), from the verb cacher (“to hide”).

Etymology from Wiktionary, CC BY-SA 3.0