concerto

noun

1. A piece of music for one or more solo instruments and orchestra.

   “And the cello concerto was strikingly different on Sunday: at Weill, the ensemble included two violinists and one violist, cellist, bassist and lutenist, but on Sunday four more violinists, a second violist and a harpsichordist were added to give the ripieno sections of the fast movements a heftier punch than the smaller group delivered.”