| 1. | Also called fore-and-aft topsail. a jib-headed fore-and-aft sail set above a gaff. |
| 2. | a quadrilateral fore-and-aft sail set above the spanker of a bark, between the gaff of the spanker and an upper gaff. |
| gaff-top·sail (gāf'tŏp'səl, -sāl') n. Nautical A light triangular or quadrilateral sail set over a gaff. |