from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To expose or ridicule the falseness, sham, or exaggerated claims of: debunk a supposed miracle drug.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To discredit, or expose to ridicule the falsehood or the exaggerated claims of something
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. expose while ridiculing; especially of pretentious or false claims and ideas
de- + bunk (from bunkum) 1923 (Wiktionary)