Prog..
The definition of Prog is as difficult to pinpoint as the definition of metal. But to me, Prog can mean the seventies prog rock sound outlined by bands like Yes, King Crimson and current bands like The Flower Kings, and it can also mean music which is progressive, breaking new boundries, Such as Maudlin Of The Well, and Enslaved, as well as the power prog movement brough on by bands like Dream Theatre and Pain Of Salvation..
Prog is such a broad genre, like metal. And when the two genres are combined, some confusion is understandable.. But who really cares. Everyone has their own personal way of classifying music, just so our minds can get around the sheer volume of varying styles of music. But lately it has been getting so difficult, because styles are mixing, and multiplying. But i try not to let myself get bothered by other peoples definitions of a genre, because I know that just like me, they are classifying their music in their own way. So I don't really care..