WordNet sense 1 (a native or inhabitant of Thailand):

Tai, Thai

WordNet sense 2 (a branch of the Tai languages):

Central Thai

WordNet sense 3 (very similar):

twin

WordNet sense 4 (marked by correspondence or resemblance):

similar

WordNet sense 5 (a slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip):

Siamese cat

WordNet sense 6 (joined or linked together):

connected