Source : Webster's Revised Unabridged Dictionary (1913)

Nondescript \Non"de*script\, a. [Pref. non- + L. descriptus
   described.]
   Not hitherto described; novel; hence, odd; abnormal;
   unclassifiable.

Nondescript \Non"de*script\, n.
   A thing not yet described; that of which no account or
   explanation has been given; something abnormal, or hardly
   classifiable.

Source : WordNet®

nondescript
     adj : lacking distinct or individual characteristics; dull and
           uninteresting; "women dressed in nondescript clothes";
           "a nondescript novel" [syn: {characterless}]
     n : a person is not easily classified and not very interesting