/ Dictionary / Index S subpurlin: Meaning and Definition of Find definitions for: sub•pur•lin Pronunciation: (sub-pûr'lin), [key] — n. a light structural member for carrying roofing materials, supported by and running at right angles to purlins. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subprogram subquarter Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language