/ Dictionary / Index T trysail mast: Meaning and Definition of Find definitions for: try'sail mast" Pronunciation: [key] — Naut. Naut. a small auxiliary mast fastened just abaft the mainmast or foremast of a sailing vessel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trysail try square Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language