/ Dictionary / Index S span roof: Meaning and Definition of Find definitions for: span' roof" Pronunciation: [key] a roof having two slopes of equal breadth and pitch meeting at a common ridge. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spanrail spanworm Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language