| Noun | 1. | Siamese - a branch of the Tai languagesTai - the most widespread and best known of the Kadai family of languages | |
| 2. | Siamese - a native or inhabitant of ThailandKingdom of Thailand, Siam, Thailand - a country of southeastern Asia that extends southward along the Isthmus of Kra to the Malay peninsula; "Thailand is the official name of the former Siam" | |
| 3. | Siamese - a slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip | |
| Adj. | 1. | Siamese - of or relating to or characteristic of Thailand or its people; "Siamese kings"; "different Thai tribes live in the north" | |
| 2. | Siamese - of or relating to the languages of the Thai people; "Thai tones" | |
| 3. | Siamese - of or relating to Thailand; "the Thai border with Laos" | |
| 4. | siamese - very similarsimilar - marked by correspondence or resemblance; "similar food at similar prices"; "problems similar to mine"; "they wore similar coats" | |
| 5. | siamese - connecting two or more pipes or hoses or having such a connection; "a Y-shaped siamese joint"; "siamese fire-hose lines" | |