- Hereon is defined as upon, on or immediately following.
An example of hereon used as an adverb is in the sentence, "He will pay off his credit card bill, hereon receiving his paycheck," which means "He will pay off his credit card bill, upon receiving his paycheck."
hereon definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
hereon definition by American Heritage Dictionary
On this; hereupon.