Hero | Definition of hero by Merriam-Webster

Full Definition of HERO

1

a : a mythological or legendary figure often of divine descent endowed with great strength or ability

b : an illustrious warrior

c : a man admired for his achievements and noble qualities

d : one who shows great courage

2

a : the principal male character in a literary or dramatic work

b : the central figure in an event, period, or movement

3

plural usually he·ros : submarine 2

4

: an object of extreme admiration and devotion : idol

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A motto of his hero, Thomas Edison, is inscribed on a favorite sweatshirt : “To invent you need a good imagination and a pile of junk.” —Britt Robson, Mother Jones, May/June 2008
Greater authors—Arthur Conan Doyle most notably—have been in the same dilemma when seeking closure. And, like Conan Doyle, Rowling has won imperishable renown for giving us an identifiable hero and a fine caricature of a villain, and for making a fictional bit of King's Cross station as luminous as a certain address on nearby Baker Street. —Christopher Hitchens, New York Times Book Review, 12 Aug. 2007
Here's a novel by a decorated war hero with a fictional Middle Eastern desert war at its core. It pits an American-led coalition against a potentially lethal enemy … —Lorenzo Carcaterra, People, 3 June 1991
Other physicists, long wedded to the notion that nothing can escape from a black hole, have generally come to accept that discovery. And the stuff emitted from little black holes (and big ones too, but far more slowly) is now called Hawking radiation. “In general relativity and early cosmology, Hawking is the hero,” says Rocky Kolb, a physicist at Fermilab in Illinois. —Leon Jaroff, Time, 8 Feb. 1988
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