Siamese

American  

[sahy-uh-meez, -mees] / ˌsaɪ əˈmiz, -ˈmis /

adjective

1. of or relating to Siam, its people, or their language.

2. the former term for Thai.

3. twin; closely connected; similar.

4. Informal. dual; combined; twofold or two-way.

   a Siamese sprinkler.

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noun

plural

Siamese

1. a native of Siam.

2. former name of Thai.

3. Siamese cat.

4. (usually lowercase) a standpipe placed outside a building close to ground level, having two or more openings so that fire engines can pump water to the sprinkler system of the building.

Siamese British  

/ ˌsaɪəˈmiːz /

noun

1. See Siamese cat

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adjective

1. characteristic of, relating to, or being a Siamese twin

adjective

1. another word for Thai

Etymology

Origin of Siamese

First recorded in 1685–95; Siam + -ese

Example Sentences

Thai nationalists decry what they say is cultural theft by "Claimbodia", while their Khmer counterparts have dubbed them "Siamese thieves".

From BBC • Jul. 25, 2025

The Anguianos felt overwhelmed and distraught: Somewhere in that forest was their small, brownish seal point Siamese cat that had run off from the Fishing Bridge RV Park.

From Los Angeles Times • Sep. 22, 2024

Siamese crocodiles were once widespread throughout much of South East Asia.

From BBC • Jul. 18, 2024

The least expensive were the Russian blue and the Siamese.

From New York Times • Jun. 7, 2024

Or the Haitian couple who lived a couple of blocks over from Moss, the ones who had the Siamese cat who intimidated passersby from the window.

From "Anger Is a Gift" by Mark Oshiro