Definition of south southeast:
(n) :
Alternative form of south-southeast. [The compass point halfway between southeast and south; specifically at a bearing of 157.5°.]
(adj) :
Alternative form of south-southeast. [Of, in or pertaining to the south-southeast; south-southeastern.]
(adv) :
Alternative form of south-southeast. [Towards or in the direction of the south-southeast; south-southeastwards.]