Definition of hero noun from the Oxford Advanced American Dictionary

      

    hero

     noun
    noun
    NAmE//ˈhɪroʊ//
     
    , NAmE//ˈhiroʊ//
     
    (pl. heroes)
     
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  1. 1a person, especially a man, who is admired by many people for doing something brave or good a war hero (= someone who was very brave during a war) The Olympic skaters were given a hero's welcome on their return home. one of the country's national heroes
  2. 2 the main male character in a story, novel, movie, etc. The hero of the novel is a ten-year old boy.
  3. 3a person, especially a man, that you admire because of a particular quality or skill that they have my childhood hero see also heroine
  4. 4 = submarine sandwich
See the Oxford Advanced Learner's Dictionary entry: hero