/suy'euh meez", -mees"/ , adj., n., pl. Siamese .
adj.
1. of or pertaining to Siam, its people, or their language.
2. Thai (def. 3).
3. twin; closely connected; similar.
4. Informal. dual; combined; twofold or two-way: a Siamese sprinkler.
n.
5. a native of Siam.
6. Thai (def. 2).
7. See Siamese cat .
8. ( usually l.c. ) 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.
[ 1685-95; SIAM + -ESE ]