/ Dictionary / Index M mountaintop: Meaning and Definition of Find definitions for: moun•tain•top Pronunciation: (moun'tn-top"), [key] — n. the top or summit of a mountain. —adj. situated at the top or summit of a mountain: a mountaintop house. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mountain time Mountain View Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language