The Collaborative International Dictionary of English v.0.48:

Polynesian \Pol`y*ne"sian\, a.
   Of or pertaining to Polynesia (the islands of the eastern and
   central Pacific), or to the Polynesians.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Polynesians \Pol`y*ne"sians\, n. pl.; sing. Polynesian.
   (Ethnol.)
   The race of men native in Polynesia.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Polynesian
    adj 1: of or relating to Polynesia or its people or culture
    n 1: a native or inhabitant of Polynesia
    2: the branch of the Austronesian languages spoken from
       Madagascar to the central Pacific [syn: Malayo-Polynesian,
       Polynesian]