Definition of piracies:
(n) :
The unauthorized duplication of goods protected by intellectual property law.
(n) :
(crime, nautical) Robbery at sea, a violation of international law; taking a ship away from the control of those who are legally entitled to it.
(n) :
A similar violation of international law, such as hijacking of an aircraft.
(n) :
The operation of an unlicensed radio or television station.
(n) :
(ornithology) Kleptoparasitism.