Source : Webster's Revised Unabridged Dictionary (1913)

Pawnee \Pawn*ee"\, n. (Law)
   One or two whom a pledge is delivered as security; one who
   takes anything in pawn.

Pawnees \Paw`nees"\, n. pl.; sing. {Pawnee}. (Ethnol.)
   A tribe of Indians (called also {Loups}) who formerly
   occupied the region of the Platte river, but now live mostly
   in the Indian Territory. The term is often used in a wider
   sense to include also the related tribes of Rickarees and
   Wichitas. Called also {Pani}.

Source : WordNet®

Pawnee
     n 1: a member of the Pawnee nation formerly living in Nebraska
          and Kansas but now largely in Oklahoma
     2: the Caddoan language spoken by the Pawnee people