/ Dictionary / Index T thundering: Meaning and Definition of Find definitions for: thun•der•ing Pronunciation: (thun'dur-ing), [key] — adj. of, pertaining to, or accompanied by thunder. producing a noise or effect like thunder. very great; extraordinary: a thundering amount of work. —n. thunder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thundering (Thesaurus) thunderhead thunder mug Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language