- Palaeosiberian⇄adj. of or having to do with the Palaeosiberians or their languages
- Palaeosiberian⇄noun 1. any one of a number of aboriginal peoples of northeastern Siberia speaking languages that do not belong to any of the large language families.
2. the group of languages spoken by these peoples. - Palaeosiberian⇄Palaeosiberian, noun, adjective.