/ Dictionary / Index B block mountain: Meaning and Definition of Find definitions for: block' moun"tain Pronunciation: [key] — Geol. Geol. a mountain formed by the uplift of blocks of the earth's crust. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. block mast block organization. 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