/ Dictionary / Index H herein: Meaning and Definition of Find definitions for: here•in Pronunciation: (hēr-in'), [key] — adv. in or into this place. in this fact, circumstance, etc.; in view of this. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: herein (Thesaurus) Herefordshire hereinafter Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language