Whats this Literature you speak of?

What really counts as Literature. Well the way i see it, its just about covers most of the things that a person can read. Well not all. I see it, that in order for something to be Literature it has to have meaning-a purpose. Something that the auther had an intended purpose for. A message that can be taken out of the text. Something that you learn from as or after you read. If you read something, and can't get a single thing out of it, then its not Literature. Its just a jumble of words. Pointless. Your just wasting your time reading it. Single words to whole books, and any in the middle can be Literature. Your saying a single word can't be. Well it sure can. Billboards sometime have their entire message-with the help of the background-in one word. You read the single word and get the whole message and meaning of the word. If you just saw the same word by itself -just there- then thats not litrature to me. Just a word that has no meaning in the real world.