Hero (noun)

1. A person, typically a man, who is admired or idealized for courage, outstanding achievements, or noble qualities.
2. A person who is admired for their bravery, outstanding achievements, or noble qualities.
3. The principal character in a play, film, novel, or other fictional work.

Origin:

Middle english (originally in the sense "demigod"): via old french from latin heros, from greek hērōs, literally "protector, defender".

Examples:

1. He is a hero for his actions in the war.
2. She is a hero for her humanitarian work.
3. Superman is a hero to many children.
4. The firefighters were heroes for their bravery in saving the burning building.
5. The novel's hero is a young man who sets out on a journey to save the world.