(1880–1964), Irish playwright. Notable plays: The Shadow of a Gunman (1923) and Juno and the Paycock (1924).
Definition of O'Casey, Sean in US English:
O'Casey, Sean
proper nounōˈkāsē
(1880–1964), Irish playwright. His plays, such as The Shadow of a Gunman (1923) and Juno and the Paycock (1924), deal with the Irish poor before and during the civil war that followed the establishment of the Irish Free State in 1922.