sagaEnglishOxford New American Dictionarysaga /ˈsäɡə, ˈsɑɡə / ▸ noun a long story of heroic achievement, especially a medieval prose narrative in Old Norse or Old Icelandic: a figure straight out of a Viking saga. ▪ a long, involved story, account, or series of incidents: the saga of her engagement. – ORIGIN early 18th century : from Old Norse, literally ‘narrative’; related to saw3.