The phrase denotes a collection of specialized vocabulary and their corresponding explanations associated with a specific expansive narrative or heroic tradition. For example, understanding the meaning of epithets, kennings, and heroic boasts is crucial for interpreting works such as the Iliad, Odyssey, or Beowulf.
Grasping these terms allows for a deeper appreciation of the literary techniques employed and provides insight into the cultural values and societal structures reflected in the narratives. This knowledge facilitates a richer understanding of the historical context in which these stories were created and transmitted.