WordNet sense 1 (the compass point midway between south and east; at 135 degrees):

southeastward, Se, sou'-east

WordNet sense 2 (the southeastern region of the United States):

southeastern United States

WordNet sense 3 (coming from the southeast):

southeasterly

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

southeastern

WordNet sense 5 (situated in or facing or moving toward or coming from the south):

south

WordNet sense 6 (to, toward, or in the southeast):

south-east