At the risk of being overly simplistic, I always thought of classical music as instrumental music from a certain period of time. Whether my definition is "correct" or not really makes no difference to me. All that matters to me is whether the music moves me. When I can feel it from the top of my head to the tips of my toes and it resonates in my solar plexus (sic), then that's all I need to know. (and it's one of the primary reasons I had no desire to be a music major, much to the disappointment of my dad)

:-)