The Collaborative International Dictionary of English v.0.48:

Kansas \Kan"sas\, prop. n.
   A state of the central United States, bordering the
   Mississippi River to the west.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Kansas \Kan"sas\, prop. n. pl. (Ethnol.)
   A tribe of Indians allied to the Winnebagoes and Osages. They
   formerly inhabited the region which is now the State of
   Kansas, but were removed to the Indian Territory.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Kansas
    n 1: a state in midwestern United States [syn: Kansas,
         Sunflower State, KS]
    2: a member of the Siouan people of the Kansas river valley in
       Kansas [syn: Kansa, Kansas]
    3: a river in northeastern Kansas; flows eastward to become a
       tributary of the Missouri River [syn: Kansas, Kansas
       River, Kaw River]
    4: the Dhegiha dialect spoken by the Kansa [syn: Kansa,
       Kansas]