Thai

UK: /ˈtaɪ/ US: /taɪ/ ,(tī)

WordReference Random House Learner's Dictionary of American English © 2025

Thai /taɪ/   n. 

1. [countable] a person born or living in Thailand.
2. [uncountable] the language spoken in Thailand.

adj. 
3. of or relating to Thailand.
4. of or relating to the language spoken in Thailand.

WordReference Random House Unabridged Dictionary of American English © 2025

Thai  (tī), n. 

Also called Thai•land•er  (tī′lan′dər, -lən-). a native or descendant of a native of Thailand.
1. Language Varieties the language of Thailand, a member of the Tai group of languages.

adj. 

2. Place Names of or pertaining to Thailand, its people, or their language;
   Siamese.

Also, Tai. 

Collins Concise English Dictionary © HarperCollins Publishers::

Thai / taɪ/ adjective

1. of, relating to, or characteristic of Thailand, its people, or their language

noun

1. (Thais, Thai) a native or inhabitant of Thailand
2. the language of Thailand, sometimes classified as belonging to the Sino-Tibetan family