A "reunion concert" refers to a musical performance by a band or group of musicians who have come together again after a period of time apart. Full definition
Keith Mayerson and Peter Saul together is like the Throbbing Gristle reunion concert of painting shows. (artfcity.com)
May 19 — Concert at Washington State Labor Council, 321 16th Ave. S, Seattle — 7:30 PM, Reunion concert with Shays Rebellion!! (johnpauloconnor.com)
When the Bad Boy Family Reunion concert came to Philips Arena, Sean «Diddy» Combs requested to bypass metal detectors and he was denied, the lawsuit said. (sbnation.com)