The Collaborative International Dictionary of English v.0.48:

Folklore \Folk"lore`\, n., or Folk lore \Folk" lore`\ .
   Tales, legends, or superstitions long current among the
   people; the unwritten literature of a culture, such as
   stories, proverbs, riddles and songs. --Trench.
   [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

folklore
    n 1: the unwritten lore (stories and proverbs and riddles and
         songs) of a culture