from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Belonging to the period after a war, especially the U.S. Civil War: postbellum houses; postbellum governments.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of the period following a war.
- adj. In the United States, of the period following the Civil War, especially used in reference to the South.
Latin post, after + bellum, war.(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin post ("after") + bellum ("war") (Wiktionary)