Tos ‧ ca ‧ ni ‧ ni, Ar ‧ tu ‧ ro /ˌtɒskəˈniːni $ ˌtɑːs-, ɑːˈtʊ ə rəʊ $ ɑːr-/ BrE AmE
(1867–1957) an Italian ↑ conductor (=someone who directs a group of musicians) known for his work at La Scala in Milan, Italy, at the Metropolitan Opera Company in New York City, and with the NBC Symphony Orchestra in New York City