/ Dictionary / Index B block mast: Meaning and Definition of Find definitions for: block' mast' Pronunciation: [key] — Naut. Naut. a short mast from the head of which a lateen yard is suspended. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. block line block mountain Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language