The Collaborative International Dictionary of English v.0.48:
NNE \NNE\ n. (All capitals) north northeast; the compass point that is midway between north and northeast. Syn: north northeast, nor'-nor'-east. [WordNet 1.5]WordNet (r) 3.0 (2006):
NNE n 1: the compass point that is midway between north and northeast [syn: north northeast, nor'-nor'-east, NNE]