The term North Slavic languages (or North Slavonic languages) has three meanings.
It is sometimes (albeit not very often) used to combine the West Slavic and the East Slavic languages into one group due to the fact that the Southern Slavic dialects were geographically cut off by the Hungarian settlement of the Pannonian plain in the 9th century along with Austria and Romania being geographical barriers. Due to this geographical separation, the North Slavs and South Slavs developed apart from each other with noteworthy cultural differences.
North Slavic peoples today include the Belarusians, Czechs, Kashubians, Poles, Silesians, Rusyns, Russians, Slovaks, Sorbs, and Ukrainians. They inhabit a contiguous area in Central and Eastern Europe and North Asia.
The greatest disparities are between South Slavic tongues and the rest of the Slavonic languages. Moreover, there are many exceptions and whole dialects that break the division of East and West Slavic languages; thus the Slavs are clearly divided into two main linguistic groups: the North Slavs and the South Slavs, which can then be further categorised as the Northwest tongues (Czech, Kashubian, Polish, Silesian, Slovak, and Sorbian) and the Northeast ones (Belarusian, Russian, Rusyn, and Ukrainian) – whereas the Southern branch is split into the widely accepted groups of the Southwest languages (Serbo-Croatian and Slovene) and the Southeast tongues (Bulgarian and Macedonian). This model is argued as being more appropriate than the triple dissection of east, west and south.