From WordNet (r) 2.0 :
cache
n 1: a hidden storage space (for money or provisions or weapons)
2: a secret store of valuables or money [syn: hoard, stash]
3: (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 [syn: memory cache]
v : save up as for future use [syn: hoard, stash, lay away,
hive up, squirrel away]