/ Dictionary / Index H H.B.M.: Meaning and Definition of Find definitions for: H.B.M. Pronunciation: [key] His Britannic Majesty; Her Britannic Majesty. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. H-beam HBO Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language