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

Siamese plural

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

Other Word Forms

Noun Inflected Forms

• Siamese
  plural

Etymology

Origin of Siamese

First recorded in 1685–95; Siam + -ese

Example Sentences

Walker, from Bishopston in Bristol, said her Siamese Oriental cat Maneesha escaped through a hole in the fence before being injured.

From BBC • May 4, 2026

She said she was trying to transfer Rayne Beau and his sister, Star, a flame point Siamese cat, from the truck to the traveling trailer.

From Los Angeles Times • Sep. 22, 2024

The conservation team then dispatched people to make sure the nests were protected round the clock - until all the eggs hatched, bringing 60 baby Siamese crocs into the world.

From BBC • Jul. 18, 2024

The least expensive were the Russian blue and the Siamese.

From New York Times • Jun. 7, 2024

They were twin Siamese, one too comfortably settled on the bed to do more than twitch an ear.

From "Typical American" by Gish Jen