Definition of west northwest:
(n) :
Alternative form of west-northwest. [The compass point halfway between west and northwest; specifically at a bearing of 292.5°.]
(adj) :
Alternative form of west-northwest. [Of, in or pertaining to the west-northwest; west-northwestern.]
(adv) :
Alternative form of west-northwest. [Towards or in the direction of the west-northwest; west-northwestwards.]