NOUN (3)

1. a member of the Caddo people formerly living between Kansas and central Texas;

2. the largest city in Kansas; located in southern Kansas on the Arkansas River;

3. the Caddoan language spoken by the Wichita;

The Collaborative International Dictionary of English v.0.48:

Wichitas \Wich"i*tas\ (w[i^]ch"[i^]*t[add]z), prop. n. pl.;
   sing. Wichita (w[i^]ch"[i^]*t[add]). (Ethnol.)
   A tribe of Indians native of the region between the Arkansas
   and Red rivers. They are related to the Pawnees. See
   Pawnees.
   [1913 Webster] wick

WordNet (r) 3.0 (2006):

Wichita
    n 1: a member of the Caddo people formerly living between Kansas
         and central Texas
    2: the largest city in Kansas; located in southern Kansas on the
       Arkansas River
    3: the Caddoan language spoken by the Wichita