Kind of secret

• Abbr. akin to "anon." after a folk song
• Conventional (jazz)
• Like folk mus
• Common liner note abbr. on a folk album
• Like much folk music (abbr.)
• Like some folk music (abbr.)
• Passed down, as folk mus
• Style of jazz

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Trad \Trad\, obs. imp. of Tread . --Chaucer.

WordNet Word definitions in WordNet
n. traditional jazz as revived in the 1950s