Originality is the quality of being new and inventive. A composer who writes a symphony to be played by car horns and cell phones shows great originality.
When something is original, it is creative and not derived from something else. It's fresh. Originality refers to the quality of being original and new. Inventors are full of originality: they need to think of brand new ideas and products. A great artist is full of originality, especially when coming up with new and surprising types of art. If something is just like other things, it shows no originality. True originality is a rare thing.