Cadenza
In music, a cadenza (from Italian: cadenza [kaˈdɛntsa], meaning cadence; plural, cadenze [kaˈdɛntse]) is, generically, an improvised or written-out ornamental passage played or sung by a soloist(s), usually in a "free" rhythmic style, and often allowing virtuosic display. During this time, the accompaniment will rest or sustain a note or chord.