from The American Heritage® Dictionary of the English Language, 5th Edition.
- A historical region of southeast-central Europe extending across western Romania, northeast Serbia, and southern Hungary. Formerly an ethnically mixed province of the Habsburg empire, it was partitioned with the breakup of Austria-Hungary in 1918.
from The Century Dictionary.
- noun In Hungary, a border province ruled by a ban; the territory or jurisdiction of a ban; specifically, the Temesvar banat in southeastern Hungary, distinctively called the Banat, formally reunited to Hungary in 1860.
- noun The office of a ban.
from the GNU version of the Collaborative International Dictionary of English.
- noun The territory governed by a ban.
Sorry, no etymologies found.
In this way, when the province of Bukowina and the territory known as the Banat, just north of the Danube and west of what is now Roumania, were reconquered from the Turks, it was the joint kingdom to which they were attached.
Croatia had for above a year been in almost open mutiny, but the spirit of revolt now spread through the whole of the Serb population of Southern Hungary, from the eastern limits of Slavonia,  across the plain known as the Banat beyond the junction of the Theiss and the Danube, up to the borders of Transylvania.
In the Banat, which is the granary of the Austrian empire, trees grow well for fifteen, twenty, or twenty-five years, and then die away.
Further, there were about 700,000 Serbs and Croats in the south of Hungary proper, cast and north of the Danube, known as the Banat and Ba [) c] ka, a district which during the eighteenth and early nineteenth centuries was the hearth and home of Serb literature and education, but which later waned in importance in that respect as independent Serbia grew.
Fortunately I made some friends in the city, a handful of young writers from the Aktionsgruppe Banat.
And because the word for tear in our Banat dialect sounds like the Romanian word for train, the squeaking of the railcars on the tracks always sounded to me like crying.
Like so many ethnic groups who have fled to the U.S. before them, the Roma of various nationalities settled first in the Tri-State area: some spread out while others remained together, including the Macedonian Muslim Roma and Albanian Roma living in the Bronx; the Serbian Banat Roma living in Ridgewood, Queens; and the Polish Lovara based in Staten Island.
And Nadine Labaki's warmhearted hit "Caramel" ( "Sukkar Banat," 2007) about the romantic travails of women young and old, Christian and Muslim, straight and gay takes yet another approach.
Here's a clip from the movie with the main soundtrack, "Sukkar Ya Banat":
Almost all the Jews of Serbia and Banat, as well as several hundred from Kosovo and a group of Central European Jewish émigrés who had been interned in Šabac on their way to Palestine, were liquidated in this fashion.