/ Dictionary / Index H HG: Meaning and Definition of Find definitions for: HG Pronunciation: [key] High German. Home Guard. Hg Pronunciation: [key] — Symbol, Chem. mercury. hg Pronunciation: [key] hectogram; hectograms. H.G. Pronunciation: [key] High German (def. 1). His Grace; Her Grace. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hg (Thesaurus) hf. bd. hGH Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language