Pirate (steamboat)
WordNet
noun
(1) A ship that is manned by pirates
(2) Someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation
(3) Someone who uses another person's words or ideas as if they were his own
verb
(4) Take arbitrarily or by force
"The Cubans commandeered the plane and flew it to Miami"
(5) Copy illegally; of published material