Definition from Wiktionary, the free dictionary
Proper noun 
- A famous ancient Greek epic poem about the Trojan War, attributed to Homer.
- Any long tragic story.
- 1907: Gilbert Parker, The Weavers - [As they] listened to the tale he unfolded, some glow of pity must have possessed them; for it was an Iliad of herculean struggle against absolute disaster, ending with the bitter news of his grandfather's death.
Derived terms 
ancient Greek epic poem about the Trojan War
Iliad (plural Iliads)
- A specific version, edition, translation, or copy of the above-mentioned Homeric text.