/ Dictionary / Index H heroism: Meaning and Definition of Find definitions for: her•o•ism Pronunciation: (her'ō-iz"um), [key] — n. the qualities or attributes of a hero or heroine: He showed great heroism in battle. heroic conduct; courageous action: Pat's returning into the burning building was true heroism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heroism (Thesaurus) heroine heroize Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language