Stark means "complete or extreme," like the stark contrast between your music taste — punk and weird metal — and your mom's, with all her 1950's doo-wop favorites.
In describing a place, stark means "providing no shelter or sustenance." A barren desert or a room with no furniture or curtains is stark. It can also mean "severe, stern, or austere," like the stark beauty of the rocky cliffs in the west of Ireland. Stark can also be used to mean "totally." If you are called stark, raving mad, there's no question about it: you are acting completely crazy.