Filibuster, a name given to buccaneers who infested the Spanish-American coasts or those of the West Indies, but more specially used to designate the followers of Lopez in his Cuban expedition in 1851, and those of Walker in his Nicaraguan in 1855; a name now given to any lawless adventurers who attempt to take forcible possession of a foreign country.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Fildes, S. Luke * Filigree