- The definition of Achilles is a figure from Greek mythology who was a hero of the Trojan War.
An example of Achilles is the warrior who died from being shot in the heel with an arrow.
A statue of the Greek warrior, Achilles.
Gr. Myth. Greek warrior and leader in the Trojan War who kills Hector and is killed by Paris with an arrow that strikes his only vulnerable spot, his heel: he is the hero of Homer's Iliad
Origin of AchillesClassical Latin ; from Classical Greek Achilleus
The hero of Homer's Iliad, the son of Peleus and Thetis and slayer of Hector.