/ Dictionary / Index H hereon: Meaning and Definition of Find definitions for: here•on Pronunciation: (hēr-on', -ôn'), [key] — adv. hereupon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hereof Herero Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language