Fenian
n
1 (formerly) a member of an Irish revolutionary organization founded in the U.S. in the 19th century to fight for an independent Ireland
2 (Irish myth) one of the Fianna
3 Derogatory, offensive an Irish Catholic or a person of Irish Catholic descent
adj
4 of or relating to the Fenians
(C19: from Irish Gaelic feinne, plural of fian band of warriors)
♦
Fenianism n