Source : Webster's Revised Unabridged Dictionary (1913)

Natchez \Natch"ez\, n. pl. (Ethnol.)
   A tribe of Indians who formerly lived near the site of the
   city of Natchez, Mississippi. In 1729 they were subdued by
   the French; the survivors joined the Creek Confederacy.

Source : WordNet®

Natchez
     n : a town in southwest Mississippi on the Mississippi River