NOUN (2)

1. a native or inhabitant of Tahiti;

2. the Oceanic language spoken on Tahiti;


ADJECTIVE (1)

1. of or relating to or characteristic of the island of Tahiti or its residents or their language and culture;

The Collaborative International Dictionary of English v.0.48:

Tahitian \Ta*hi"ti*an\, a.
   Of or pertaining to Tahiti, an island in the Pacific Ocean.
   -- n. A native inhabitant of Tahiti.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Tahitian
    adj 1: of or relating to or characteristic of the island of
           Tahiti or its residents or their language and culture
    n 1: a native or inhabitant of Tahiti
    2: the Oceanic language spoken on Tahiti