/ Dictionary / Index S steel lumber: Meaning and Definition of Find definitions for: steel' lum'ber Pronunciation: [key] metal lumber composed of sheet steel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. steelie steelmaker Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language