Piracy /(pī"rȧ*sy̆)/

pl. Piracies ((-sĭz))

1. The act or crime of a pirate.
2. Robbery on the high seas; the taking of property from others on the open sea by open violence; without lawful authority, and with intent to steal; -- a crime answering to robbery on land. (Common Law)
3. “Sometimes used, in a quasi-figurative sense, of violation of copyright; but for this, infringement is the correct and preferable term.”