1.  siamese(n = noun.communication) central thai, thai - a branch of the Tai languages;
is a kind of tai
Derived form adjective siamese₂

2.  siamese(n = noun.person) tai, thai - a native or inhabitant of Thailand;
is a kind of asian, asiatic
is a member of kingdom of thailand, siam, thailand
Derived form adjective siamese₁

3.  siamese(n = noun.artifact) siamese connection - an inlet with two or more couplings to which a hose can be attached so that fire engines can pump water into the sprinkler system of a building;
is a kind of inlet, intake
is a part of sprinkler system

4.  siamese(n = noun.animal) siamese cat - a slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip;
is a kind of domestic cat, felis catus, felis domesticus, house cat
has particulars: blue point siamese

1.  siamese(a = adj.pert) tai, thai - of or relating to or characteristic of Thailand or its people; "Siamese kings"; "different Thai tribes live in the north"
Derived form noun siamese₂

2.  siamese(a = adj.pert) tai, thai - of or relating to the languages of the Thai people; "Thai tones"
Derived form noun siamese₁

3.  siamese(a = adj.pert) tai, thai - of or relating to Thailand; "the Thai border with Laos"

   Of or pertaining to Siam, its native people, or their language. [1913 Webster]

1.  A native or inhabitant of Siam; pl., the people of Siam. [1913 Webster]

2.  The language of the Siamese. [1913 Webster]

siamese, n. & adj.
--n. (pl. same)
1 a a native of Siam (now Thailand) in SE Asia. b the language of Siam.
2 (in full Siamese cat) a a cat of a cream-coloured short-haired breed with a brown face and ears and blue eyes. b this breed.
--adj. of or concerning Siam, its people, or language.

Idiom:
Siamese twins
1 twins joined at any part of the body and sometimes sharing organs etc.
2 any closely associated pair.

blue point siamese, siamese cat, siamese twin