What is 'jazz'? Well, it is a word definately! But, like the word 'book' it tells you very little about its content. There are several commentators (Marsalis and Crouch, for example) who are presented, by the media' as if they have a monopoly on the definition of the word 'jazz'. I hear words like 'Swing' and 'the Blues' but, whilst I accept the credibility of the arguments, don't have to look very far to find something that is 'jazz' that doesn't swing or contain any blue notes. I guess that any time anyone tries to draw a line around what jazz is, someone immediately steps over it. Does it Swing? Define swing and I'll tell you!! I agree it is in the performance of the piece but that is still a bit amorphus, isn't it?
Trad Jazz, Classic Jazz, Modern Jazz, Progressive Jazz, Orchestral Jazz, Jazz Funk, Jazz Rock, Acid Jazz, Free Jazz - the list is endless. Who decides what is and what isn't 'jazz'. Bottom line is, you do. As do I, as does Paul Warburton and Ken Smith and...... you get my point. There are 1000s of players the world over who think you can't play jazz on an electric bass! Tell that to Steve Swallow!
If you go and a listen to every cd ever discussed in Downbeat, Jazziz, Jazz Journal, Jazzwise etc then, in about 10 years, you will have your very own definition of what jazz is and then we can all disagree with you
. In the meantime, enjoy the journey