/ Dictionary / Index T thunderstorm: Meaning and Definition of Find definitions for: thun•der•storm Pronunciation: (thun'dur-stôrm"), [key] — n. a transient storm of lightning and thunder, usually with rain and gusty winds, sometimes with hail or snow, produced by cumulonimbus clouds. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thunderstorm (Thesaurus) thunderstick thunderstrike Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language