Mordva uncommon noun 1. a member of the agricultural people living in the central Volga provinces of European Russia SynonymsMordvinMordvinian 2. the Finnic language spoken by the Mordvin people SynonymsMordvinMordvinian Related words Broader terms VolgaicRussian Parts Soviet Russia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.