west-northwest adjective 3adverb 1noun 1 adjective3 •Of, in or pertaining to the west-northwest; west-northwestern. •Situated toward or in the direction of the west-northwest; west-northwestward; west-northwesterly.A west-northwest course. •Coming from the west-northwest; west-northwesterly.A west-northwest wind. adverb1 •Towards or in the direction of the west-northwest; west-northwestwards.We are travelling west-northwest at the moment. noun1 •The compass point halfway between west and northwest; specifically at a bearing of 292.5°.