Bosnia (region)
Bosnia (/Босна; ) is the northern region of Bosnia and Herzegovina, encompassing roughly 81% of the country; the other eponymous region, the southern part, is Herzegovina. "Bosnia" is an informal term for the whole country.
Bosnia Eyalet
The Eyalet of Bosnia (, ) or Bosnia Beylerbeylik (, ) was an eyalet (also known as a "beylerbeylik") of the Ottoman Empire, mostly based on the territory of the present-day state of Bosnia and Herzegovina. Prior to the Great Turkish War, it had also included most of Slavonia, Lika, and Dalmatia in present-day Croatia. Its reported area in the 19th century was .