Dictionary.com
Thesaurus.com

Siam

American  
[sahy-am, sahy-am] / saɪˈæm, ˈsaɪ æm /

noun

  1. former name of Thailand.

  2. Gulf of, Thailand.


Siam British  
/ ˈsaɪæm, saɪˈæm /

noun

  1. the former name (until 1939 and 1945–49) of Thailand

  2. an arm of the South China Sea between the Malay Peninsula and Indochina the former name of (the Gulf of) Thailand

"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

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.

See Examples For:

Find insight on Siam Cement, Forrestania Resources, Liontown Resources and more in the latest Market Talks covering basic materials.

From The Wall Street Journal Jul. 14, 2026

The 23-year-old Thai began the final day with a two-stroke lead and went on to clinch the top prize at the Siam Country Club Old Course in the coastal resort Pattaya.

From Barron's Feb. 22, 2026

The Pizza Port Brewing Company and Pizzeria Luigi both have meat and vegan pies, and there are also two Thai restaurants nearby, Aroma Thai and Siam Imperial Kitchen.

From Los Angeles Times Oct. 16, 2024

Gaza City resident Said Siam said prices have dropped in recent weeks.

From Seattle Times May 6, 2024

In the fifteenth century, Angkor Wat was abandoned to the jungles after an invasion by Siam and forgotten about until French explorers rediscovered it in the nineteenth century.

From "First They Killed My Father: A Daughter of Cambodia Remembers" by Loung Ung

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training