Well there are different types of riches. First is becoming rich in money, next is with wisdom as follows friends, attitude and so on. But if you are aiming to become rich in money you really need to have enough knowledge so that you are going to apply that if you are already on your way to become a successful person and knowledge is the treasure that can't ever be stolen by someone.
You are right, the word rich means money and people do have any definitions with it, some may say that they are rich in the sense that they have lots of friends and other stuffs. But we are really talking money here. Getting rich is not easy at all since it would require too many hard works, investments, time and effort in able to attain it.