Nouns

(n)Thai, Tai, Siamesea native or inhabitant of Thailand
(n)Thai, Siamese, Central Thaia branch of the Tai languages, spoken in central Thailand, centered in Bangkok

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”