from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Usage Problem Thus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. thus (in this way).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. in the way indicated
thus + -ly, dating from the 19th century, seemingly coined by educated writers to make fun of uneducated persons trying to sound genteel, with a false inference that thus is not an adverb. (Wiktionary)