TahitianPronunciation: /tɑːˈhiːʃ(ə)n, -ˈhiːtɪən/Definition of Tahitian noun 1a native or inhabitant of Tahiti, or a person of Tahitian descent. 2 [mass noun] the language of Tahiti, a Polynesian language with about 125,000 speakers. adjective relating to Tahiti, its people, or their language. Tahitian in other Oxford dictionaries Definition of Tahitian in the US English dictionary