D defs.my
Entry 2 senses Webster, 1913

Dixie

/(dĭks"y̆)/ · Dix·ie · IPA /ˈdɪksi/
01 prop. n. A colloquial name for the Southern portion of the United States, esp. during the Civil War.
  1. 1.
    A colloquial name for the Southern portion of the United States, esp. during the Civil War.[U.S.]
  2. 2.
    a song popular in the Confederate states during the American Civil War, and still played as a nostalgic anthem by those patriotic to the American south. It was written by Daniel D. Emmett in 1859.
Phrases & compounds
whistle Dixie — to talk unrealistically; to engage in unrealistic or overoptimistic fantasies; as, that ain't just whistlin' Dixie.