Nouns

(n)southeast, sou'-east, southeastward, SEthe compass point midway between south and east; at 135 degrees
(n)southeastthe direction corresponding to the southeastward compass point
(n)southeasta location in the southeastern part of a country, region, or city

Adjectives

(s)southeasterly, southeastcoming from the southeast“southeasterly breezes”
(s)southeast, southeastern, southeasterlysituated in or oriented toward the southeast

Adverbs

(r)southeast, south-east, sou'-eastto, toward, or in the southeast