Question

What is the definition of "cache," and in what circumstances would it be appropriate to use it?

Answer 1

Cache is defined as being stored or put away
Some examples include:
The troops are looking for the former dictator’s cache of gold bars.
When digging in the backyard, I discovered a cache of antique coins
So use it when your talking about something hidden.

Answer 2

If we're talking about the computer language, cache is a memory area where a temporary copy of data stored in a slower access medium is maintained, in order to speed up data recovery. Cache's function is that of storing data and instructions that the CPU may need soon. It enables the processor to work with full capacity and have as little downtime as possible.