Source : Webster's Revised Unabridged Dictionary (1913)

Kurdish \Kurd"ish\, a.
   Of or pertaining to the Kurds. [Written also {Koordish}.]

Source : WordNet®

Kurdish
     adj : of or relating to Kurdistan or the Kurds or their language
           and culture; "Kurdish Moslems"
     n : an Iranian language spoken in Turkey and Iran and Iraq and
         Syria and Russia