(hîr′ō)n.pl.he·roes1. A person noted for feats of courage or nobility of purpose, especially one who has risked or sacrificed his or her life: soldiers and nurses who were heroes in an unpopular war.2. A person noted for special achievement in a particular field: the heroes of medicine. See Synonyms at celebrity.3. The principal character in a novel, poem, or dramatic presentation.4. In mythology and legend, an individual, often a man of divine ancestry, who is endowed with great courage and strength, celebrated for bold exploits, and favored by the gods.