/ Dictionary / Index M main-topgallantmast: Meaning and Definition of Find definitions for: main-top•gal•lant•mast Pronunciation: (mān'top-gal'unt-mast", -mäst"Naut.mān'tu-gal'unt-must), [key] — n. Naut. the mast next above the main-topmast. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. main-topgallant main-topmast Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language