/ Dictionary / Index H H-beam: Meaning and Definition of Find definitions for: H-beam Pronunciation: (āch'bēm"), [key] — n. an I-beam having flanges the width of the web. Also calledSee illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Hb H.B.M. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language