a family of languages including especially Burmese, Tibetan, and the various local languages and dialects whose speakers share literary Chinese as their standard language.
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British Dictionary definitions for Sino-Tibetan
a family of languages that includes most of the languages of China, as well as Tibetan, Burmese, and possibly Thai. Their most noticeable phonological characteristic is the phonemic use of tones
belonging or relating to this family of languages
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012