na I. \nə\adverb Etymology: Middle English (northern dialect), from Old English nā — more at no chiefly Scotland: by no means : no, not — often combined with a preceding verb < a wooer like me mauna hope to come speed — Robert Burns > II. conjunction 1.[Middle English, from Old English nā, from nā, adverb]chiefly Scotland: nor 2.chiefly Scotland: than III. abbreviation 1. nadir 2. nail