/ Dictionary / Index T topmast: Meaning and Definition of Find definitions for: top•mast Pronunciation: (top'mast", -mäst"Naut.top'm&schwast), [key] — n. Naut. the mast next above a lower mast, usually formed as a separate spar from the lower mast and used to support the yards or rigging of a topsail or topsails. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: topmast (Thesaurus) topman topmaul Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language