noun
epic poem; epic poetry
Refers to long narrative poems about heroic deeds and events, as a literary genre or individual works.
ホメロスの叙事詩は西洋文学の基礎です。
Homer's epic poems are the foundation of Western literature.
この叙事詩は古代の英雄の冒険を描
This epic poem depicts the adventures of an ancient hero.
物語 is a broader term for tales and stories, not limited to verse; 叙事詩 specifically denotes epic poetry.
From 叙事 (じょじ, 'narration') + 詩 (し, 'poem'). The term is a Meiji-era coinage used to translate the Western concept of epic poetry.