Nouns

(n)Thai, Tai, Siamesea native or inhabitant of Thailand
(n)Taithe most widespread and best known of the Kadai family of languages

Adjectives

(a)Thai, Tai, Siameseof or relating to or characteristic of Thailand or its people“Siamese kings”, “different Thai tribes live in the north”
(a)Thai, Tai, Siameseof or relating to the languages of the Thai people“Thai tones”
(a)Thai, Tai, Siameseof or relating to Thailand“the Thai border with Laos”