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English definition of “hero”

hero

noun [C] uk   /ˈhɪə.rəʊ/ us    /ˈhɪr.oʊ/ (plural heroes)

hero noun [C] (PERSON)

B1 a person who is admired for having done something very brave or having achieved something great: a war hero He became a national hero for his part in the revolution.humorous Graham says he'll take my parents to the airport at four o'clock in the morning - what a hero!
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See also
Heroes and cowardsExceptional qualities, things and people
B1 (female heroine) the main male character in a book or film who is usually good: the hero of her latest novel
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Characters in literature and film
someone who you admire very much: Humphrey Bogart's my hero - I've seen every one of his movies.
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Heroes and cowards

hero noun [C] (FOOD)

US a long sandwich filled with cold meat, cheese, salad, etc.Sandwiches and snacks
(Definition of hero from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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