Breadcrumb Home > Dictionary > Index S spanworm: Meaning and Definition of Find definitions for: span•worm Pronunciation: (span'wûrm"), [key] — n. measuringworm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. span roof spar ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language