southeastern

adjective1

1. •
   Of or pertaining to the southeast.

   • The southeastern part of the country is the most affluent.

adjective2

1. •
   Of or relating to any of various particular regions named for the cardinal direction in which they lie.
2. •
   (US) Of or relating to the southeastern region of the contiguous United States.

   • Some of these Southeastern rainstorms are shocking to folks who didn't grow up here.