Siam

American

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

noun

former name of Thailand.
Gulf of, Thailand.

Siam British

/ ˈsaɪæm, saɪˈæm /

noun

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

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Siam

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

Bangkok police chief Siam Boonsom said Sunday that there was traffic congestion at the crossing daily, but never an accident.

From Barron's ● May 18, 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

“They were innocent people,” said Hussein Siam, whose relatives were among the dead.

From Seattle Times ● Dec. 31, 2023

A boy told him there were albino elephants from Siam.

From "Dreaming in Cuban" by Cristina García

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