/her"oh iz'euhm/ , n.
1. the qualities or attributes of a hero or heroine: He showed great heroism in battle.
2. heroic conduct; courageous action: Pat's returning into the burning building was true heroism.
[ 1660-70; HERO + -ISM; cf. F héroïsme ]
Syn. 1. intrepidity, valor, prowess, gallantry, bravery, courage, daring, fortitude.
Ant. 1. cowardice, timidity.