Wikipedia
Pogost (, from Old East Slavic: погостъ) is a historical term with several meanings in the Russian language. It has also been borrowed into Latgalian (pogosts), Finnish (pogosta) and Latvian (pagasts), with specific meanings.
The original usage applies to the coaching inn for princes and ecclesiastics with the word being similar to modern Russian gost' (гость), "guest". It is assumed that originally pogosts were rural communities on the periphery of the ancient Russian state, as well as trading centers (Old Russian: gost'ba, гостьба).
In the end of the 10th century pogosts transformed into administrative and territorial districts. Pogosts varied in size, ranging from tens to hundreds of villages in 11th—14th centuries. As Christianity spread in Russia, churches were built in pogosts. In 1775 the last pogosts that served as administrative districts were destroyed. Since then they became known as city pogosts (погосто - место), functioning as parish centers.
In the central uyezds of 15th-16th centuries pogosts were small settlements with a church and a graveyard, like Kizhi Pogost or Kadnikov Pogost. In modern Russian, pogosts usually designate a combination of a rural church and a graveyard, situated at some distant place.