Siamese

[sahy-uh-meez, -mees]

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.

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

/ ˌsaɪəˈmiːz /

noun

1. See Siamese cat

adjective

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

adjective

1. another word for Thai

Word History and Origins

Origin of Siamese¹

First recorded in 1685–95; Siam + -ese