Fenianism

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Fe·ni·an

F0078300 (fē′nē-ən)n.1. One of a legendary group of heroic Irish warriors of the second and third centuries ad.2. A member of a secret revolutionary organization in the United States and Ireland in the mid-19th century, dedicated to the overthrow of British rule in Ireland.
[From alteration (influenced by féne, body of freemen under early Irish law) of Irish Gaelic fianna, bands of young warriors, from Old Irish fíanna, pl. of fían.]
Fe′ni·an adj.Fe′ni·an·ism n.

Fenianism

the principles and practices of an Irish revolutionary organization founded in New York in 1858, especially its emphasis on the establishment of an independent Irish republic. — Fenian, n., adj.See also: Politics