from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To build up; increase or enlarge: sand dunes that were upbuilt by the wind.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To build up (literally).
- v. To build up; to develop (figuratively).
from The Century Dictionary and Cyclopedia
- To build up; edify; establish.
up- + build (Wiktionary)