Go to www.enjoythemusic.com They have a link called hifi glossary. That should help.
There is a Chesky sampler/test CD that tells you what an audiphile term is and then plays an example that helps describe that term. For example, they describe "dynamics", tell you what it is, and play a very dynamic big band piece to illustrate it. They do that same thing with 10-15 other popular audiophile terms. It's worth checking out.