/ Dictionary / Index G gaff topsail: Meaning and Definition of Find definitions for: gaff' top'sail Pronunciation: [key] — Naut. Naut. Also calleda jib-headed fore-and-aft sail set above a gaff. a quadrilateral fore-and-aft sail set above the spanker of a bark, between the gaff of the spanker and an upper gaff. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gaff sail gaff-topsail catfish Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language