newgrass

Blend of new +‎ bluegrass; term arose in the 1970s

newgrass (uncountable)

1. A progressive subgenre of bluegrass music, typically incorporating electric instruments, non-traditional chord progressions, and lengthy improvisation.
   • 2002, Bill C. Malone, Country music, U.S.A.:

     At the beginning of the new century, the chief standard bearers of the newgrass style are an ensemble of California-born musicians known as Nickel Creek...

• Swangers