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Thai

American  
[tahy] / taɪ /

adjective

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

noun

plural

Thais,

plural

Thai

  1. Also called Thailander.  a native or or inhabitant of Thailand, or a person of Thai descent.

  2. the language of Thailand, a member of the Tai group of languages.

Thai British  
/ taɪ /

adjective

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a native or inhabitant of Thailand

  2. the language of Thailand, sometimes classified as belonging to the Sino-Tibetan family

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Thai

First recorded in 1800–10; from Thai; literally, “free,” a self-designation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The dollar was 0.2% higher at 159.69 yen and 1.0% higher at 32.27 Thai baht.

From The Wall Street Journal • Apr. 13, 2026

Top holdings include Thai Foods Group, which distributes poultry and other food stuffs in Thailand, and Brazilian energy companies Petroreconcavo and Petrobras.

From Barron's • Apr. 12, 2026

Thai Randolph, former Hartbeat CEO, launched Nile & Co. and acquired BuzzFeed’s As/Is and Goodful brands for $500,000.

From The Wall Street Journal • Apr. 9, 2026

The Thai military brought us there because they said they wanted the world to see just how big the scam industry had become in Cambodia.

From BBC • Apr. 6, 2026

Maybe they just thought the Thai mac and cheese was so good it needed an armed escort.

From "The Son of Neptune" by Rick Riordan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.