/ Dictionary / Index T topgallant forecastle: Meaning and Definition of Find definitions for: top•gal'lant fore"castle Pronunciation: (top"gal'untNaut.tu&sylpgal'unt), [key] — Naut. Naut. a partial weather deck on top of a forecastle superstructure; forecastle deck. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. topfull topgallant mast Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language