Source : Webster's Revised Unabridged Dictionary (1913)

Polynesian \Pol`y*ne"sian\, a.
   Of or pertaining to Polynesia (the islands of the eastern and
   central Pacific), or to the Polynesians.

Polynesians \Pol`y*ne"sians\, n. pl.; sing. {Polynesian}.
   (Ethnol.)
   The race of men native in Polynesia.

Source : WordNet®

Polynesian
     n : a native or inhabitant of Polynesia