Simply put, an epic is a long poem about gods or heroes. The poem is written in the narrative style, which means that it tells a story. An epic poem focuses on the actions and deeds of the hero. It is also written in an elevated style and it usually follows specific patterns, including announcing the subject at the beginning and asking for the help of a god or other supernatural force.
Ancient epics were recited for entertainment, which is amazing considering their lengths, and were not recorded in writing until long after they had become familiar to many. Odyssey, which was written by Homer, is a very famous epic poem; other epics that may be familiar to you are The Iliad and Beowulf. Recently, these epic poems have become the subjects of films such as Oh, Brother, Where Art Thou? and (the self-titled) Beowulf.
a long poem, whose story extends over along period of time or tells agreat events