>>A 3 dimensional array would be something like this:
>>
>>DIMENSION xyz[a,b,c]
>>
>>
>>Think of being able to reference a single element like an array of books, the page in a book, and a word on that page in the book.
>
>Great sample. I was trying to imagine 3 dimensions as time, x & y and it didn't work.

You could extend this to even more dimensions:

4th - libraries
5th - cities
6th - countries

etc.

You could then reference with a single array, any word on any page in any book in any library in any city in any country.