As nouns the difference between epic and elegy
is that
epic is an extended narrative poem in elevated or dignified language, celebrating the feats of a deity or demigod (heroic epic) or other legendary or traditional hero while
elegy is a mournful or plaintive poem; a funeral song; a poem of lamentation.
As an initialism EPIC
is explicitly Parallel Instruction Computing.
As an adjective epic
is of, or relating to, an epic.