Wordnet 3.0
NOUN (1)
1. 
 an Iranian language spoken in Turkey and Iran and Iraq and Syria and Russia; 
ADJECTIVE (1)
1. 
 of or relating to Kurdistan or the Kurds or their language and culture; 
- Example: "Kurdish Moslems"
The Collaborative International Dictionary of English v.0.48:
Kurdish \Kurd"ish\, prop. a.
   Of or pertaining to the Kurds, the Kurdish language, or
   Kurdistan. [Written also Koordish.]
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Kurdish \Kurd"ish\, prop. n.
   The language of the Kurds; it is related to Farsi, the modern
   Iranian language. [Written also Koordish.]
   [1913 Webster]
WordNet (r) 3.0 (2006):
Kurdish
    adj 1: of or relating to Kurdistan or the Kurds or their
           language and culture; "Kurdish Moslems"
    n 1: an Iranian language spoken in Turkey and Iran and Iraq and
         Syria and Russia