I was learning a mazurka-inspired guitar piece by Julio Sagreras when I realized that I had no clear idea as to what a mazurka is. So I looked around, and came up with these illuminations:
Bolshoi Ballet Mazurka :
Horowitz plays a Chopin Mazurka:
A Klezmer Mazurka:
So the mazurka, it seems, is like the blues or the sonnet: a form with which you can say just about anything.