n. A thing not yet described; that of which no account or explanation has been given; something abnormal, or hardly classifiable. [ 1913 Webster ]
a. [ Pref. non- + L. descriptus described. ] 1. Not hitherto described; hence, of no recognizable type or class; odd; abnormal; unclassifiable. [ 1913 Webster ]
2. Dull or uninteresting; undistinguished. [ PJC ]