What makes a piece of music a Fantasia?
OK, this is not MS related and I have googled it but I'm not much the wiser.
"A fantasia is a musical composition with its roots in the art of improvisation. Because of this, the fantasia, like the impromptu, seldom follows the textbook rules of any strict musical form." - Wikipedia.
Is there a better definition than this? If I slow a Fantasia down, (e.g. to make a harpsichord piece playable on guitar), is it still a Fantasia?