WordNet sense 1 (the cardinal compass point that is at 180 degrees):

s, due south

WordNet sense 2 (the southern states that seceded from the United States in 1861):

confederacy, dixieland, dixie, Confederate States, Confederate States of America

WordNet sense 3 (any region lying in or toward the south):

southland

WordNet sense 4 (situated in or oriented toward the south):

southern

WordNet sense 5 (moving toward the south):

southward

WordNet sense 6 (in a southern direction):

in the south, to the south