from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Immediately after this.
- adv. At or on this.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. immediately afterward; at this.
from the GNU version of the Collaborative International Dictionary of English
- adv. On this; hereon.
from The Century Dictionary and Cyclopedia
- Upon this; following or on account of this.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. immediately after this
here + upon (Wiktionary)