a person who attacks and robs ships at sea
in the three weeks leading up to the attack, sixteen container ships had been boarded by pirates
a pirate ship
a person who appropriates or reproduces the work of another for profit without permission, usually in contravention of patent or copyright
software pirates
pirate recordings
a person or organization that broadcasts radio or television programmes without official authorization
a pirate radio station
use or reproduce (another's work) for profit without permission, usually in contravention of patent or copyright
his latest album has been pirated and downloaded so many times since its release that he's lost $10 million in sales
the company is seeking compensation from people who pirated the movie