noun Nic·co·lò [nik-uh-loh; Italian neek-kaw-law] /ˈnɪk əˌloʊ; Italian ˌnik kɔˈlɔ/, 1784–1840, Italian composer and violinist. nounNiccolò (nikkoˈlɔ). 1782–1840, Italian violinist and composer