/ Dictionary / Index M microburst: Meaning and Definition of Find definitions for: mi•cro•burst Pronunciation: (mī'kru-bûrst"), [key] — n. Meteorol. an intense, localized downdraft of air that spreads on the ground, causing rapid changes in wind direction and speed; a localized downburst. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microbrewery microbus Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language