What does "lore" mean?

Lore: That which is or may be learned or known; the knowledge gained from tradition, books, or experience; often, the whole body of knowledge possessed by a people or class of people, or pertaining to a particular subject; as, the lore of the Egyptians; priestly lore; legal lore; folklore. "The lore of war." Fairfax. His fair offspring, nursed in princely lore. Milton.