/ Dictionary / Index B beam fill: Meaning and Definition of Find definitions for: beam' fill" Pronunciation: [key] — Building Trades. Building Trades. material, as concrete, for filling spaces between beams or joists in or on top of a masonry wall. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. beam-ends beaming 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