Altaic language al·taic·lan·guage uncommon noun 1. a group of related languages spoken in Asia and southeastern Europe SynonymsAltaicAltaic language Related words Broader terms Ural-Altaic Narrower terms TurkiTungusicMongolianKoreanJapanese WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.