Multi-dimensional Arrays

What is a multi-dimensional array?

In Java, a multi-dimensional array is an array that contains other arrays as its values or members. The container array is termed an outer array, and the member array is termed an inner array. An array is said to be a multi-dimensional array if it has another array as its members.

Can you think of some instances where we might have been using a structure that is the same as a multi-dimensional array? One such example is a crossword puzzle!