the.com/jazz fusion

means A late-1960s/70s style blending jazz improvisation with rock, funk, and R&B rhythms and electric instruments.

from The word 'fusion' simply means a merging — from Latin fundere, 'to pour or melt together.' Musicians applied it to themselves when jazz players started plugging into amps, borrowing rock's backbeat and funk's groove, and electric keyboards and guitars melted into what had been an acoustic tradition. No single inventor coined the term; it emerged organically through the late 1960s and 1970s as critics and musicians needed a word for a sound that no longer fit neatly in the 'jazz' bin.