The Collaborative International Dictionary of English v.0.48:

Zunis \Zu"[~n]is\, n. pl.; sing. Zu[~n]i. (Ethnol.)
   A tribe of Pueblo Indians occupying a village in New Mexico,
   on the Zu[~n]i River.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Zuni
    n 1: a member of the Pueblo people living in western New Mexico