The Romanian dialects (subdialecte or graiuri) are the several varieties of the Romanian language (Daco-Romanian). The dialects are divided into two types, northern and southern, but further subdivisions are less clear, so the number of dialects varies between two and occasionally twenty. Most recent works seem to favor a number of three clear dialects, corresponding to the regions of Wallachia, Moldavia, and Banat (all of which actually extend into Transylvania), and an additional group of varieties covering the remainder of Transylvania, two of which are more clearly distinguished, in Crișana and Maramureș, that is, a total of five.
The main criteria used in their classification are the phonetic features. Of less importance are the morphological, syntactical, and lexical particularities, as they are too small to provide clear distinctions.
All Romanian dialects are at least somewhat mutually intelligible.
The term dialect is sometimes avoided when speaking about the Daco-Romanian varieties, especially by Romanian linguists, who regard Daco-Romanian, Aromanian, Megleno-Romanian, and Istro-Romanian as "dialects" of a single Romanian language. It is partly from Romanian linguists having adopted the French and German usage of the term "dialect", as opposed to English-language usage.
In French and German, a dialecte/Dialekt refers to a closely related but separate language tightly linked, for cultural and historical reasons, to a certain language of reference. For instance, Scots would be a dialecte/Dialekt of English under the French and German meaning of the word, but it is not a dialect as it is understood in English.
Early dialectal studies of Romanian tended to divide the language according to administrative regions, which in turn were usually based on historical provinces. This led sometimes to divisions into three varieties, Wallachian, Moldavian, and Transylvanian, or four, adding one for Banat. Such classifications came to be made obsolete by the later, more rigorous studies, based on a more thorough knowledge of linguistic facts.