MoldaviaPronunciation: /mɒlˈdeɪvɪə/Translate Moldavia | into Italian | into Spanish Definition of Moldavia 1a former principality of SE Europe. Formerly a part of the Roman province of Dacia, the principality came under Turkish rule in the 16th century. In 1861 Moldavia united with Wallachia to form Romania. 2another name for Moldova.Moldavia in other Oxford dictionaries Definition of Moldavia in the US English dictionary