ETYM as. soern. Related to South.
1. In or characteristic of a region of the United States south of (approximately) the Mason-Dixon line.
2. Situated in or coming from regions of the south.

The dialect of English spoken in most of the Chesapeake Bay area, the coastal plain and the greater part of the upland plateau in Virginia, North Carolina, South Carolina, and Georgia, and the Gulf states at least as far west as the valley of the Brazos in Texas and sometimes taken to include the south Midland area