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Definition of siam
siam
/saɪˈæm/
Si · am
Adjective:Siamese
siam Lexical Profile
CEFR
B2
Grade
7
Tier
2
Usage
Rare
Syllables
2
• noun
1
The historical name of Thailand, a country located in mainland Southeast Asia bordered by Myanmar, Laos, Cambodia, Malaysia, the Andaman Sea, and the Gulf of Thailand, officially used until 1939 and briefly from 1946 to 1948.
Synonyms
View all synonyms for siam• Rhymes for siam
• Nearby Words
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Siam. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/siam