/ Dictionary / Index M marvelous: Meaning and Definition of Find definitions for: mar•vel•ous Pronunciation: (mär'vu-lus), [key] — adj. superb; excellent; great: a marvelous show. such as to cause wonder, admiration, or astonishment; surprising; extraordinary. improbable or incredible: the marvelous events of Greek myth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: marvelous (Thesaurus) marvel-of-Peru marver Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language