Estonian Syllabification: (Es·to·ni·an)Pronunciation: /eˈstōnēən/Translate Estonian | into German | into Spanish Definition of Estonian noun 1a native or inhabitant of Estonia, or a person of Estonian descent. 2the Finno-Ugric language of Estonia, closely related to Finnish. adjective relating to Estonia, its people, or their language. Estonian in other Oxford dictionaries Definition of Estonian in the British & World English dictionary